http://nysmithmath.forumotion.net/feed/? Latest topics Fri, 12 Jun 2009 20:53:03 GMT 10 http://intranet.meriden.k12.ct.us/maloney/maloney_WEB/clubs/images/MathSymbols50_000.jpg http://nysmithmath.forumotion.net/feed/? http://nysmithmath.forumotion.net/higher-level-problems-f10/a-little-problem-t63.htm theonlyMattinMathCounts
4 = 2 + 2
6 = 3 + 3
8 = 3 + 5
10 = 5 + 5
...

Two things:
1.) Was I lying before? Can every single one be expressed this way? How about 10234598692032 (or some really big number like that)?

2.) If every single one can be expressed this way, why?]]> Higher Level Problems Sun, 29 Mar 2009 01:33:27 GMT http://nysmithmath.forumotion.net/higher-level-problems-f10/a-little-problem-t63.htm#375 http://nysmithmath.forumotion.net/higher-level-problems-f10/a-little-problem-t63.htm http://nysmithmath.forumotion.net/geometry-f2/difficult-geometry-problem-t64.htm Muthu^96
There are two possible triangles with AB = 13, BC = 10, and angle A = 40 degrees. What is the sum of the two possible values of angle B?

]]> Geometry Fri, 12 Jun 2009 20:53:03 GMT http://nysmithmath.forumotion.net/geometry-f2/difficult-geometry-problem-t64.htm#378 http://nysmithmath.forumotion.net/geometry-f2/difficult-geometry-problem-t64.htm http://nysmithmath.forumotion.net/geometry-f2/circle-geometry-t60.htm Archis The following is an interesting geometry problem from my previous competition: The radius of circle O is 12 inches and segment AB and CD are tangent to the circle at B and D respectively. AB= 16, and CD= 5 inches. What is OC + OA in inches? Feel free to post solutions or techniques, where later I will reveal the correct answer. Geometry Wed, 25 Mar 2009 22:30:43 GMT http://nysmithmath.forumotion.net/geometry-f2/circle-geometry-t60.htm#362 http://nysmithmath.forumotion.net/geometry-f2/circle-geometry-t60.htm http://nysmithmath.forumotion.net/higher-level-problems-f10/sizes-of-infinity-t57.htm theonlyMattinMathCounts Which of the following infinitely large sets is largest? a.) the set of all rational numbers b.) the set of all positive even numbers c.) the set of all positive odd numbers d.) the set of all real numbers from 0 to 1, inclusive e.) the set of all counting numbers (1, 2, 3, 4, ...) f.) All of the above sets are the same size. If your answer is a-e, provide a proof as to why the set you chose is larger. P.S. Where am I getting these points from? Here is the answer Spoiler:The ... Higher Level Problems Mon, 09 Mar 2009 01:45:35 GMT http://nysmithmath.forumotion.net/higher-level-problems-f10/sizes-of-infinity-t57.htm#332 http://nysmithmath.forumotion.net/higher-level-problems-f10/sizes-of-infinity-t57.htm http://nysmithmath.forumotion.net/forum-help-f3/another-question-t11.htm Mira Holford What does locking a forum do and why would it be done?]]> Forum Help Tue, 07 Oct 2008 01:18:14 GMT http://nysmithmath.forumotion.net/forum-help-f3/another-question-t11.htm#41 http://nysmithmath.forumotion.net/forum-help-f3/another-question-t11.htm http://nysmithmath.forumotion.net/solved-problems-f12/function-problem-t7.htm Ben R Define a ♣ b = a^2 – b. What is the value of (2(4 ♣ 13)) ♣ (3(3 ♣ 5))? ANSWER (DO NOT CLICK UNTIL YOU HAVE FINISHED THE PROBLEM AND POSTED ANSWER): Spoiler:Following order of operations, we will solve the inner-most parenthesis first. (4 ♣ 13) = 42 – 13 = 16 – 13 = 3 (3 ♣ 5) = 32 – 5 = 9 – 5 = 4 23 ♣ 34 = 8 ♣ 81 = 82 – 81 = 64 – 81 = –17 -From ... Solved Problems Mon, 06 Oct 2008 23:51:31 GMT http://nysmithmath.forumotion.net/solved-problems-f12/function-problem-t7.htm#24 http://nysmithmath.forumotion.net/solved-problems-f12/function-problem-t7.htm http://nysmithmath.forumotion.net/algebra-f1/simple-algebra-t61.htm shrewdgirl8 ]]> Algebra Wed, 25 Mar 2009 22:55:29 GMT http://nysmithmath.forumotion.net/algebra-f1/simple-algebra-t61.htm#364 http://nysmithmath.forumotion.net/algebra-f1/simple-algebra-t61.htm http://nysmithmath.forumotion.net/counting-probability-f4/zillo-s-picnic-t41.htm Archis
Zillian and Zillo live on the planet Zarquon Z. Due to atmospheric pollution, Zarquon Z experiences acidic rainfall with 1/4 of a chance on a SINGLE day. Zillo is planning a picnic for the next five days and hopes for clear skies in that time. What is the probability of NO acidic rainfall the next FIVE days on Zarquon Z?]]> Counting & Probability Tue, 23 Dec 2008 18:53:59 GMT http://nysmithmath.forumotion.net/counting-probability-f4/zillo-s-picnic-t41.htm#279 http://nysmithmath.forumotion.net/counting-probability-f4/zillo-s-picnic-t41.htm http://nysmithmath.forumotion.net/competitions-f17/global-domination-competition-3-t56.htm Archis Good afternoon! We have 10 open slots for this new competition. These 10 positions are determined by a first come-first serve basis. Sign up in the forum by replying to this topic. When replying, tell me what the color of your country is and what you will name it. The game is pretty simple to follow: Annihiliate your opponents, gain more land, and attain power What you can do per turn: A) Skip your turn B) Increase naval power (+10 ships) C) Increase weapon strength (+1 up ... Competitions Thu, 05 Mar 2009 22:11:34 GMT http://nysmithmath.forumotion.net/competitions-f17/global-domination-competition-3-t56.htm#317 http://nysmithmath.forumotion.net/competitions-f17/global-domination-competition-3-t56.htm http://nysmithmath.forumotion.net/miscellaneous-f5/how-to-find-the-formula-of-this-permutations-t59.htm Anonymous Hi to all of you guys here… May this thread fits on this section. A friend of mine gave me this enigma. It is written in Excel format. Since here I can’t attach .xls file, I don't know how to put the file, name Enigma.xls. There are infinite amount of tables, with ten rows (row 0,1,2,….9) each. Inside of each tables, there are numbers from 1 to 92, 93 to 184, 185 to 276, and 277 to 284, which lie on their certain rows. Here I gave the example tables that have been filled in for 40 tables. ... Miscellaneous Mon, 23 Mar 2009 15:12:55 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/how-to-find-the-formula-of-this-permutations-t59.htm#357 http://nysmithmath.forumotion.net/miscellaneous-f5/how-to-find-the-formula-of-this-permutations-t59.htm http://nysmithmath.forumotion.net/miscellaneous-f5/pi-day-pi-discussion-and-geometry-problems-t58.htm Archis As today is Pi Day (3/14 or March 14th) you may post interesting problems on circles or interesting facts about Pi in this topic. Note that I will be updating the Geometry forum today with several circle problems. For now feel free to discuss I'll begin: One of the closest hand calculations to Pi, calculated by Indian mathematician Ramanujan, is (81+(361/22))^(1/4). Plugging this in to your calculator will leave Pi accurate to the 8th digit. Miscellaneous Sat, 14 Mar 2009 17:32:17 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/pi-day-pi-discussion-and-geometry-problems-t58.htm#355 http://nysmithmath.forumotion.net/miscellaneous-f5/pi-day-pi-discussion-and-geometry-problems-t58.htm http://nysmithmath.forumotion.net/mathcounts-f16/questions-and-practice-t50.htm Archis I have opened this thread for any questions you may have on the MathCounts program. Here is a brief laydown There are 4 rounds Sprint Round: 30 questions to be completed in 40 minutes Target Round: 8 questions administered 2 problems each, for a total of 24 minutes Team Round: 10 problems to be completed in 10 minutes by a team Levels of competition include: Chapter (Fairfax) then State (Virginia), and finally Nationals This thread is now open for all comments and questions. ... MathCounts Thu, 12 Feb 2009 21:29:06 GMT http://nysmithmath.forumotion.net/mathcounts-f16/questions-and-practice-t50.htm#299 http://nysmithmath.forumotion.net/mathcounts-f16/questions-and-practice-t50.htm http://nysmithmath.forumotion.net/forum-help-f3/question-t55.htm titanfan1312 ]]> Forum Help Thu, 19 Feb 2009 22:15:07 GMT http://nysmithmath.forumotion.net/forum-help-f3/question-t55.htm#309 http://nysmithmath.forumotion.net/forum-help-f3/question-t55.htm http://nysmithmath.forumotion.net/algebra-f1/algebraic-expansions-to-memorize-t51.htm Archis
(a^2-b^2)= (a+b)(a-b)

(a+b)^2= a^2 +2ab+ b^2

(a-b)^2= a^2 -2ab+ b^2

(a+b)^3= (a+b)(a^2 -ab +b^2)

(a-b)^3= (a-b)(a^2 +ab +b^2)

The above algebraic expansions will be helpful for both MathCounts, factoring equations, and math class. Comment below if you have anything to add.]]> Algebra Thu, 12 Feb 2009 21:33:17 GMT http://nysmithmath.forumotion.net/algebra-f1/algebraic-expansions-to-memorize-t51.htm#300 http://nysmithmath.forumotion.net/algebra-f1/algebraic-expansions-to-memorize-t51.htm http://nysmithmath.forumotion.net/miscellaneous-f5/square-roots-t54.htm BCase If you've ever wondered how to calculate square roots by yourself without guessing, this is the website for you! Here is the url: http://www.homeschoolmath.net/teaching/square-root-algorithm.php Scroll down to 'Finding Square Roots Using an Algorithm' to find the method. After you have figured it out, use the method to find the answer to this math question: What is the square root of 10? Round to the nearest thousandth. (Hint: You will need to calculate the square root to four ... Miscellaneous Wed, 18 Feb 2009 23:56:53 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/square-roots-t54.htm#307 http://nysmithmath.forumotion.net/miscellaneous-f5/square-roots-t54.htm http://nysmithmath.forumotion.net/forum-help-f3/other-math-competitions-t53.htm DCarlivati If you enjoy participating in math competitons, check out the list of what is available in high school here: http://www.albanyconsort.com/contests/contests.html Of those listed here, TJHSST participates in the AIME, AMC 10 and AMC 12. school wide, at the school. They typically send a couple of teams of 20 to the ARML held at Penn State. The Dept. of Energy holds a math competition in DC, but not every year. TJ usually prepares studnets for the IMO after participating in the USAMO. TJ ... Forum Help Tue, 17 Feb 2009 20:06:47 GMT http://nysmithmath.forumotion.net/forum-help-f3/other-math-competitions-t53.htm#305 http://nysmithmath.forumotion.net/forum-help-f3/other-math-competitions-t53.htm http://nysmithmath.forumotion.net/higher-level-problems-f10/mega-sphere-t35.htm Steve A sphere 5.5 metres in diameter is filled with 1m diameter hemi-spheres. a(1) What is the theoretical maximum amount of hemi-spheres that can be crammed into the big sphere given that the following condition is met: Each hemi-sphere's flat side (which I'll now refer to as its 'disc') has a central point (indicated by the white point shown in the hemisphere diagram to the right). The point must not 'see' another hemisphere's disc. By definition, when I say 'see', the simplest thing to imagine ... Higher Level Problems Tue, 14 Oct 2008 15:18:37 GMT http://nysmithmath.forumotion.net/higher-level-problems-f10/mega-sphere-t35.htm#204 http://nysmithmath.forumotion.net/higher-level-problems-f10/mega-sphere-t35.htm http://nysmithmath.forumotion.net/fast-math-tricks-f14/quickly-multiply-numbers-close-to-multiples-of-10-t44.htm Archis The following is a five minute video providing a smarter way of multiplying numbers close to multiples of 10. Testing the new method versus the speed of a TI-83 calculator, you'll find it much faster. THE BASIC PRINCIPLE: (10+X)(10+Y)= 100+ 10X+ 10Y+XY= 10(10+X+Y)+XY In other word, add the units digit of the second number (Y) to the first number (10+X). This will serve as your hundreds and tens digit (that's why it is multiplied by 10 above.) Add the product of the units digit (XY) ... Fast Math Tricks Fri, 26 Dec 2008 02:05:41 GMT http://nysmithmath.forumotion.net/fast-math-tricks-f14/quickly-multiply-numbers-close-to-multiples-of-10-t44.htm#284 http://nysmithmath.forumotion.net/fast-math-tricks-f14/quickly-multiply-numbers-close-to-multiples-of-10-t44.htm http://nysmithmath.forumotion.net/counting-probability-f4/number-theory-mr-mendez-s-class-problem-t49.htm Archis Since this is the Counting and Probability forum, I would like to begin with the fact that this is not the normal counting (1, 2, 3...) you may think of. By counting, I mean to introduce concepts such as casework and number theory. First question I would like to introduce: If Mr. Mendez awards extra credit points to his students with quiz grades that exceed the class average, what is the largest number of students that are awarded extra credit in a class of 107? (Note this comes from ... Counting & Probability Thu, 12 Feb 2009 21:25:58 GMT http://nysmithmath.forumotion.net/counting-probability-f4/number-theory-mr-mendez-s-class-problem-t49.htm#298 http://nysmithmath.forumotion.net/counting-probability-f4/number-theory-mr-mendez-s-class-problem-t49.htm http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/amc-8-competition-t48.htm Archis This thread is dedicated to discussion of the AMC 8 (American Mathematics Competition.) The following is a brief "laydown" of the competition 25 multiple choice question of varying difficulty 40 minutes to solve each question Perfect scores attain national distinction and attention of personal math coaches 5th to 8th graders are allowed to participate Target: Algebra I and above will most likely score above 20 in the test Scores of above 20 are allowed to proceed to the ... How to Start Becoming a Mathlete Thu, 12 Feb 2009 21:20:46 GMT http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/amc-8-competition-t48.htm#297 http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/amc-8-competition-t48.htm http://nysmithmath.forumotion.net/solved-problems-f13/the-100-days-of-christmas-t43.htm Archis In the 100 days of Christmas, on the last day of Christmas the beneficiary receives 100 ducks a quacking, 99 golden bonnets, 98 roasted pheasants and so on until 1 partridge in a pear tree. How many presents did he receive in total on that last day? HINT: Spoiler:It's basically the sum of arithmetic series with a common difference of 1 and initial term of 1. So it's just the sum of an arithmetic series. #of terms * (first term+last term)/2 Solved Problems Thu, 25 Dec 2008 13:30:57 GMT http://nysmithmath.forumotion.net/solved-problems-f13/the-100-days-of-christmas-t43.htm#283 http://nysmithmath.forumotion.net/solved-problems-f13/the-100-days-of-christmas-t43.htm http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/competiton-experiences-t47.htm Archis The following are some "tools of the trade" that I have learnt from taking past competitions. I find this is beneficial to the "How to start becoming a Mathlete" forum, because anything you have learnt from taking a certain competition may be helpful towards future test-takers. Feel free to add on some of your experiences and what you recommend for pre-competition, competition, and post-competition. Pre-competition Prepare a small study guide and look over necessary ... How to Start Becoming a Mathlete Wed, 07 Jan 2009 00:45:46 GMT http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/competiton-experiences-t47.htm#288 http://nysmithmath.forumotion.net/how-to-start-becoming-a-mathlete-f15/competiton-experiences-t47.htm http://nysmithmath.forumotion.net/miscellaneous-f5/a-problem-to-solve-t15.htm Mira Holford On January 3rd, both the democratic and republican parties in Iowa saw a record number of voters turn out for the caucus. In 2004, the Democratic Party had 124,000 at the caucus. This year, the Democratic Party had a turn out of 227,000 voters. By what percent did this year’s democratic voter participation beat 2004 democratic voter participation? Express your answer to the nearest tenth. Solution: Spoiler: First we have to find the difference between the number of voters seen in 2004 ... Miscellaneous Tue, 07 Oct 2008 21:59:01 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/a-problem-to-solve-t15.htm#62 http://nysmithmath.forumotion.net/miscellaneous-f5/a-problem-to-solve-t15.htm http://nysmithmath.forumotion.net/forum-help-f3/new-website-address-t46.htm Anonymous
THIS FORUM CAN NOW BE ACCESSED FROM THE FOLLOWING URL:

THE OLD URL ALSO STILL WORKS

-- Chris]]> Forum Help Mon, 05 Jan 2009 22:11:23 GMT http://nysmithmath.forumotion.net/forum-help-f3/new-website-address-t46.htm#287 http://nysmithmath.forumotion.net/forum-help-f3/new-website-address-t46.htm http://nysmithmath.forumotion.net/fast-math-tricks-f14/how-to-easily-square-numbers-ending-in-5-t45.htm Archis The following is an easy method to square numbers with a units digit of 5. Begin with the multiplication of 65*65 or something similar Next add one to the tens digit of the number being squared: 6+1=7 Multiply the result with the original number: 6*7= 42 Place this number before 25 to get 4225 This process should work each time The algebra behind this is as follows: 10X+5 should be represent any number with a units digit of 5. (10X+5)(10X+5) 100X^2 + 100X + 25 (10X ... Fast Math Tricks Sat, 27 Dec 2008 00:37:56 GMT http://nysmithmath.forumotion.net/fast-math-tricks-f14/how-to-easily-square-numbers-ending-in-5-t45.htm#285 http://nysmithmath.forumotion.net/fast-math-tricks-f14/how-to-easily-square-numbers-ending-in-5-t45.htm http://nysmithmath.forumotion.net/solved-problems-f11/circle-problem-t12.htm Ben R A line with slope m is tangent to a circle with its center at the origin. If the line is tangent at (3, 4), what is the value of m? Express your answer as a common fraction. Spoiler:This one requires some geometry experience. You have to know that a line tangent to a circle is perpendicular to the line from the point of intersection to the center. So, first, find out the slope of the line from the center to the point of intersection. (difference in rise)/(difference in run)= ... Solved Problems Tue, 07 Oct 2008 01:27:34 GMT http://nysmithmath.forumotion.net/solved-problems-f11/circle-problem-t12.htm#45 http://nysmithmath.forumotion.net/solved-problems-f11/circle-problem-t12.htm http://nysmithmath.forumotion.net/solved-problems-f13/zillian-and-zillo-t26.htm Archis
A) 1/4
B) 3/8
C) 1/2
D) 2/3
E) 3/4

I'll post the solution after a significant number of replies.]]> Solved Problems Sun, 12 Oct 2008 16:30:09 GMT http://nysmithmath.forumotion.net/solved-problems-f13/zillian-and-zillo-t26.htm#120 http://nysmithmath.forumotion.net/solved-problems-f13/zillian-and-zillo-t26.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-f-t40.htm Archis Theo made an elaborate code to remember the 10-digit combination to his bicycle lock. This is the code he came up with: A-K-B-J-C-H-D-G-E-F. In his code, each letter stands for a different digit (0-9). To find the combination, use the clues below to figure out what digit is represented by each letter. When two letters are written together without an operation symbol, they represent a tens digit and a ones digit. D + D + D = F B / H = K H + H = B ... Recommended Problems from Nysmith Mathcounts Teachers Tue, 11 Nov 2008 17:09:39 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-f-t40.htm#275 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-f-t40.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-e-t39.htm Archis And when was the first U. S. Census conducted, you may wonder? Why, August 1, 1790, when the U. S. population was a downright staggering 3,939,214 people. Here it is August 2000, and we've likely just eclipsed 275 million. The U.S. POPClock gives a projected estimate, if you're curious as to a more exact number. If we assume a constant rate of growth between 1790 and 2000, estimate the number of years it takes for the population to double. Recommended Problems from Nysmith Mathcounts Teachers Tue, 11 Nov 2008 17:08:29 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-e-t39.htm#274 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-e-t39.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-c-t38.htm Archis The XIII International AIDS Conference was held in Durban, South Africa. Of the 34.3 million of the world's residents infected with AIDS, 24.5 million of them live in Africa. That's right; two-and-a-half times as many sufferers of HIV/AIDS live in Africa than in the rest of the world combined. What percent of those with AIDS live in Africa? Recommended Problems from Nysmith Mathcounts Teachers Tue, 11 Nov 2008 17:06:06 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-c-t38.htm#272 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-c-t38.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-b-t37.htm Archis The latest Harry Potter book, Goblet of Fire, is massive at 734 pages, which is roughly twice the number of pages of any of the first three Potter books. Harry Potter and the Sorcerer's Stone was 309 pages and 1.13 inches thick. Harry Potter and the Prisoner of Azkaban was 435 pages and 1.47 inches thick. Assuming consistent thickness of pages and covers, how thick is Goblet of Fire? (Round to the nearest hundredth of an inch.) Recommended Problems from Nysmith Mathcounts Teachers Tue, 11 Nov 2008 17:04:32 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-b-t37.htm#271 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-b-t37.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-a-t36.htm Archis J. K. Rowling, author of the Harry Potter books, began a British tour Saturday at King's Cross train station in Central London on Platform 9-3/4. The tour is to celebrate her latest release, Harry Potter and the Goblet of Fire. In reality, there is no platform 9-3/4, except in the fictional world of Harry Potter. But let's leave reality and assume that platforms are labeled in quarter-number intervals. If the first is platform 1 and the last is platform 15, how many platforms are there total? Recommended Problems from Nysmith Mathcounts Teachers Tue, 11 Nov 2008 17:03:57 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-a-t36.htm#270 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-3-problem-a-t36.htm http://nysmithmath.forumotion.net/solved-problems-f13/quick-easy-probibility-question-t10.htm Mira Holford What is the probability that a six-faced die will roll a prime number? Answer in percentage form. Answer: Spoiler: First you find out the possible number of outcomes which is 6. Then you find out how many of the 6 are prime. There are 3 prime numbers between 1 and 6 (2,3,5). Therefore, the answer is 3/6, or 50%. The End Solved Problems Tue, 07 Oct 2008 01:00:59 GMT http://nysmithmath.forumotion.net/solved-problems-f13/quick-easy-probibility-question-t10.htm#35 http://nysmithmath.forumotion.net/solved-problems-f13/quick-easy-probibility-question-t10.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-c-t31.htm Archis According to internet officials, all three-letter dot-coms were registered. (Note: Just because it's registered doesn't guarantee that it has a live site.) How many three-letter dot-coms are there? Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 18:52:19 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-c-t31.htm#190 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-c-t31.htm http://nysmithmath.forumotion.net/forum-help-f3/little-boxes-t13.htm Steve ]]> Forum Help Tue, 07 Oct 2008 01:34:22 GMT http://nysmithmath.forumotion.net/forum-help-f3/little-boxes-t13.htm#49 http://nysmithmath.forumotion.net/forum-help-f3/little-boxes-t13.htm http://nysmithmath.forumotion.net/warm-ups-f7/warm-up-1-problem-4-t9.htm Archis Dear users of this forum, I would like to poise for discussion Problem 4 of Warm-up 1: "How many factors of 1000 are multiples of 20?" The following was my answer: Spoiler:Express 1000 as 20*50 From there you realize all you need next is to find how many factors are there of 50, to find the how many factors of 1000 are also multiples of 20. These factors would be 1,50,2,25,5,and 10 for a total of 6 factors Do you guys have any faster methods or concepts to share? ~Archis ... Warm Ups Tue, 07 Oct 2008 00:02:49 GMT http://nysmithmath.forumotion.net/warm-ups-f7/warm-up-1-problem-4-t9.htm#30 http://nysmithmath.forumotion.net/warm-ups-f7/warm-up-1-problem-4-t9.htm http://nysmithmath.forumotion.net/miscellaneous-f5/one-question-how-to-hide-answers-t6.htm Ben R Under the Algebra, Geometry and Probability forums, can we post our own problems? Oh, and for the upcoming problems, to hide your answers, this is what you do: Spoiler:ANSWER Click the box above. That's how you do a spolier. To do that, type in (spoiler)TYPE IN ANSWER / EXPLANATION HERE(/spoiler) replacing the ()s with []s. *Mod note: Good job, Ben. I would rate this post as a positive.* Miscellaneous Mon, 06 Oct 2008 23:31:21 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/one-question-how-to-hide-answers-t6.htm#19 http://nysmithmath.forumotion.net/miscellaneous-f5/one-question-how-to-hide-answers-t6.htm http://nysmithmath.forumotion.net/higher-level-problems-f10/snooker-table-t27.htm Trevin Gandhi A 'snooker' table (measuring 8 metres by 4m) with 4 'pockets' (measuring 0.5m and placed at diagonal slants in all 4 corners) contains 10 balls (each with a diameter of 0.25m) placed at the following coords: 2m,1m...(white ball) ...and red balls... 1m,5m... 2m,5m... 3m,5m 1m,6m... 2m,6m... 3m,6m 1m,7m... 2m,7m... 3m,7m The white ball is then shot at a particular angle from 0 to 360 degrees (0 being north, and going clockwise). Just to make it clear, a ball is 'potted' if at ... Higher Level Problems Sun, 12 Oct 2008 21:13:59 GMT http://nysmithmath.forumotion.net/higher-level-problems-f10/snooker-table-t27.htm#131 http://nysmithmath.forumotion.net/higher-level-problems-f10/snooker-table-t27.htm http://nysmithmath.forumotion.net/miscellaneous-f5/here-s-one-that-i-came-up-with-t23.htm Matt
[5 6
17 2]

What is A^1000?]]> Miscellaneous Thu, 09 Oct 2008 23:37:12 GMT http://nysmithmath.forumotion.net/miscellaneous-f5/here-s-one-that-i-came-up-with-t23.htm#107 http://nysmithmath.forumotion.net/miscellaneous-f5/here-s-one-that-i-came-up-with-t23.htm http://nysmithmath.forumotion.net/forum-help-f3/what-s-a-usergroup-t5.htm Mira Holford i was looking at the tabs at the top of the page when i realized that one said usergroup? whats a usergroup and can i be in one?]]> Forum Help Mon, 06 Oct 2008 23:06:07 GMT http://nysmithmath.forumotion.net/forum-help-f3/what-s-a-usergroup-t5.htm#17 http://nysmithmath.forumotion.net/forum-help-f3/what-s-a-usergroup-t5.htm http://nysmithmath.forumotion.net/forum-help-f3/what-s-with-the-time-t4.htm Steve ]]> Forum Help Mon, 06 Oct 2008 22:54:47 GMT http://nysmithmath.forumotion.net/forum-help-f3/what-s-with-the-time-t4.htm#12 http://nysmithmath.forumotion.net/forum-help-f3/what-s-with-the-time-t4.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-d-t32.htm Archis Note from Archis: This problem is separated into three sections. I have bolded the questions, and for the first section you are allowed to use Google to find the boiling points and freezing points. If you have memorized them that is accepted too. While pleasant spring days, sunshine and rising temperatures are helping to warm you up physically, this week's problems will help warm you up mathematically. First, trivia questions: What is the freezing temperature for water in Celsius and Fahrenheit? ... Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 18:59:02 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-d-t32.htm#192 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-d-t32.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-e-t33.htm Archis Note from Archis: This problem is separated into parts. The questions are bolded, but don't skim through the history. You may never know, maybe Mr. Stephens or Mrs. Broccoli will ask what are the dimensions of the Declaration of independence. On July 4, 1776, the thirteen colonies declared their independence from Britain. On July 8, the Declaration of Independence was read aloud in Philadelphia, marking the first celebration of Independence Day. The Declaration was written by Thomas Jefferson ... Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 19:02:59 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-e-t33.htm#193 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-e-t33.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-b-t30.htm Archis It's amazing how the actors pine for that 13½" tall, 8½ pound little guy. But that's because Oscar is more than just a gold trophy - he's a symbol that the work of an actress or director is worthy of the praise from his or her peers. Not surprising, then, that a crate of the statues being delivered turned up missing on March 8. Of the 55 that were missing, 52 were recovered by junk man Willie Fulgear. For returning them, he was rewarded $50,000. If the reward was proportional to the number ... Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 18:51:47 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-b-t30.htm#189 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-b-t30.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-a-t29.htm Archis Sixty-four teams are selected to participate in the NCAA championship. It is a single elimination tournament (that is, one loss and a team is out). How many games must be played to determine a champion? How many games must a team win to win the national championship? Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 18:50:55 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-a-t29.htm#188 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-2-problem-a-t29.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-b-t18.htm Archis A calculator is permitted for this problem
Note answers: may vary based on estimations

Around the District of Columbia, areas received between 7 and 19 inches of snow. According to one local weather report, within a 50-mile radius of DC, over 5 billion tons of snow fell. How many square feet of area are in a "50-mile radius"? Use the numbers above to estimate the weight of one cubic foot of the snow that fell in DC.]]> Recommended Problems from Nysmith Mathcounts Teachers Wed, 08 Oct 2008 10:21:49 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-b-t18.htm#82 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-b-t18.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-d-t21.htm Archis On 8 March 1857, women garment workers in New York City staged a protest against inhumane working conditions and low wages. Two years later, these women formed their first labour union to protect themselves and gain some basic rights in the workplace. On 8 March 1908, 15,000 women marched through New York City demanding shorter work hours, better pay, voting rights and an end to child labour. They adopted the slogan Bread and Roses, with bread symbolizing economic security and roses signifying ... Recommended Problems from Nysmith Mathcounts Teachers Thu, 09 Oct 2008 01:30:53 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-d-t21.htm#101 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-d-t21.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-c-t20.htm Archis It only happens once every 400 years. Although "leap days" occur once every four years, leap days in a year ending with two zeroes only happen once every four centuries. That's right-- there's a leap day in 2000, but there wasn't one in 1700, 1800 or 1900. What fraction of the years from 2001 through 4000 inclusive have leap days? Recommended Problems from Nysmith Mathcounts Teachers Thu, 09 Oct 2008 01:30:17 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-c-t20.htm#100 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-problem-c-t20.htm http://nysmithmath.forumotion.net/solved-problems-f13/drawing-cards-t19.htm Steve Another probablility Problem What are the chances of picking this without replacements Red Eight AND Black Ace AND a king AND king of clubs AND a black 3 AND a black King AND a black jack AND red 10 AND a red three AND a red eight AND a red nine AND a black eight AND a red King AND a black nine And a black eight AND an eight Spoiler:The solution is 0% because there are 5 eights! pay attention!!! Solved Problems Thu, 09 Oct 2008 00:25:28 GMT http://nysmithmath.forumotion.net/solved-problems-f13/drawing-cards-t19.htm#96 http://nysmithmath.forumotion.net/solved-problems-f13/drawing-cards-t19.htm http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-solutions-t28.htm Archis Dear users of this forum, Congratulations on another great week of problems. Here are the official answers from Mr. Stephens. Problem 1: "The greatest digital sum date won't occur till almost the end of this century: 09/29/99, which has digital sum 38. " Problem 2: "Fifty miles is 5280 x 50 = 264,000 feet. So, a circle of radius 50 miles has approximately pi x (264,000)2 = (3.14)(69,696,000,000) = 218,845,440,000, or almost 219 billion, square feet of area. Since ... Recommended Problems from Nysmith Mathcounts Teachers Mon, 13 Oct 2008 00:25:06 GMT http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-solutions-t28.htm#154 http://nysmithmath.forumotion.net/recommended-problems-from-nysmith-mathcounts-teachers-f9/week-1-solutions-t28.htm