User contributions
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- 13:28, 14 August 2011 (diff | hist) . . (+342) . . N 2009 AMC 8 Problems/Problem 20 (Created page with "How many non-congruent triangles have vertices at three of the eight points in the array shown below? <asy>dot((0,0)); dot((0,.5)); dot((.5,0)); dot((.5,.5)); dot((1,0)); dot((1...")
- 13:28, 14 August 2011 (diff | hist) . . (+327) . . N 2009 AMC 8 Problems/Problem 19 (Created page with "==Problems== Two angles of an isosceles triangle measure <math> 70^\circ</math> and <math> x^\circ</math>. What is the sum of the three possible values of <math> x</math>? <math...")
- 13:27, 14 August 2011 (diff | hist) . . (+1,040) . . N 2009 AMC 8 Problems/Problem 18 (Created page with "The diagram represents a <math> 7</math>-foot-by-<math> 7</math>-foot floor that is tiled with <math> 1</math>-square-foot black tiles and white tiles. Notice that the corners ha...")
- 13:27, 14 August 2011 (diff | hist) . . (+462) . . N 2009 AMC 8 Problems/Problem 17 (Created page with "==Problem== The positive integers <math> x</math> and <math> y</math> are the two smallest positive integers for which the product of <math> 360</math> and <math> x</math> is a ...")
- 13:26, 14 August 2011 (diff | hist) . . (+240) . . N 2009 AMC 8 Problems/Problem 16 (Created page with "==Problem== How many <math> 3</math>-digit positive integers have digits whose product equals <math> 24</math>? <math> \textbf{(A)}\ 12 \qquad \textbf{(B)}\ 15 \qquad \textbf{(...")
- 13:26, 14 August 2011 (diff | hist) . . (+636) . . N 2009 AMC 8 Problems/Problem 15 (Created page with "==Problem== A recipe that makes <math> 5</math> servings of hot chocolate requires <math> 2</math> squares of chocolate, <math> \frac{1}{4}</math> cup sugar, <math> 1</math> cup...")
- 13:25, 14 August 2011 (diff | hist) . . (+548) . . N 2009 AMC 8 Problems/Problem 14 (Created page with "==Problem== Austin and Temple are <math> 50</math> miles apart along Interstate 35. Bonnie drove from Austin to her daughter's house in Temple, averaging <math> 60</math> miles ...")
- 13:25, 14 August 2011 (diff | hist) . . (+385) . . N 2009 AMC 8 Problems/Problem 13 (Created page with "==Problem== A three-digit integer contains one of each of the digits <math> 1</math>, <math> 3</math>, and <math> 5</math>. What is the probability that the integer is divisible...")
- 13:25, 14 August 2011 (diff | hist) . . (-249) . . 2009 AMC 8 Problems/Problem 12
- 13:24, 14 August 2011 (diff | hist) . . (-2) . . 2009 AMC 8 Problems/Problem 12
- 13:24, 14 August 2011 (diff | hist) . . (+2) . . 2009 AMC 8 Problems/Problem 12
- 13:23, 14 August 2011 (diff | hist) . . (+854) . . N 2009 AMC 8 Problems/Problem 12 (Created page with "==Problem== The two spinners shown are spun once and each lands on one of the numbered sectors. What is the probability that the sum of the numbers in the two sectors is prime? <...")
- 13:23, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 10
- 13:23, 14 August 2011 (diff | hist) . . (+2,164) . . N 2009 AMC 8 Problems/Problem 10 (Created page with "On a checkerboard composed of 64 unit squares, what is the probability that a randomly chosen unit square does '''not''' touch the outer edge of the board? <asy> unitsize(10); ...")
- 13:22, 14 August 2011 (diff | hist) . . (+15) . . 2009 AMC 8 Problems/Problem 11
- 13:21, 14 August 2011 (diff | hist) . . (+486) . . N 2009 AMC 8 Problems/Problem 11 (Created page with "The Amaco Middle School bookstore sells pencils costing a whole number of cents. Some seventh graders each bought a pencil, paying a total of <math> $1.43</math>. Some of th...")
- 13:21, 14 August 2011 (diff | hist) . . (+697) . . N 2009 AMC 8 Problems/Problem 9 (Created page with "==Problem== Construct a square on one side of an equilateral triangle. One on non-adjacent side of the square, construct a regular pentagon, as shown. One a non-adjacent side of...")
- 13:20, 14 August 2011 (diff | hist) . . (+26) . . 2009 AMC 8 Problems/Problem 23
- 13:20, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 8
- 13:20, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 7
- 13:19, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 6
- 13:19, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 5
- 13:19, 14 August 2011 (diff | hist) . . (+12) . . m 2009 AMC 8 Problems/Problem 4
- 13:18, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 3
- 13:18, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 2
- 13:18, 14 August 2011 (diff | hist) . . (-2) . . 2009 AMC 8 Problems/Problem 1
- 13:18, 14 August 2011 (diff | hist) . . (+15) . . 2009 AMC 8 Problems/Problem 1
- 13:18, 14 August 2011 (diff | hist) . . (+299) . . N 2009 AMC 8 Problems/Problem 8 (Created page with "The length of a rectangle is increased by <math> 10%</math> and the width is decreased by <math> 10%</math>. What percent of the old area is the new area? <math> \textbf{(A)}\ ...")
- 13:17, 14 August 2011 (diff | hist) . . (+1,103) . . N 2009 AMC 8 Problems/Problem 7 (Created page with "The triangular plot of ACD lies between Aspen Road, Brown Road and a railroad. Main Street runs east and west, and the railroad runs north and south. The numbers in the diagram ...")
- 13:17, 14 August 2011 (diff | hist) . . (+392) . . N 2009 AMC 8 Problems/Problem 6 (Created page with "Steve's empty swimming pool will hold <math> 24,000</math> gallons of water when full. It will be filled by <math> 4</math> hoses, each of which supplies <math> 2.5</math> gallon...")
- 13:16, 14 August 2011 (diff | hist) . . (+497) . . N 2009 AMC 8 Problems/Problem 5 (Created page with "A sequence of numbers starts with <math> 1</math>, <math> 2</math>, and <math> 3</math>. The fourth number of the sequence is the sum of the previous three numbers in the sequenc...")
- 13:16, 14 August 2011 (diff | hist) . . (+1,578) . . N 2009 AMC 8 Problems/Problem 4 (Created page with "The five pieces shown below can be arranged to form four of the five figures shown in the choices. Which figure [b]cannot[/b] be formed? <asy> defaultpen(linewidth(0.6)); size(8...")
- 13:13, 14 August 2011 (diff | hist) . . (+17,343) . . 2010 AMC 8
- 13:03, 14 August 2011 (diff | hist) . . (+6) . . 2008 AMC 8
- 13:02, 14 August 2011 (diff | hist) . . (+323) . . 2008 AMC 8
- 13:00, 14 August 2011 (diff | hist) . . (+12,780) . . N 2008 AMC 8 (Created page with "==Problem 1== Susan had <math>$50</math> to spend at the carnival. She spent <math>$12</math> on food and twice as much on rides. How many dollars did she have left to ...")
- 11:20, 14 August 2011 (diff | hist) . . (+131) . . N AoPS Wiki:Problem of the Day/August 14, 2011 (Created page with "Find all natural numbers <math>n</math> for which each natural number written with <math>n-1</math>'ones' and one 'seven' is prime.") (current)
- 11:15, 14 August 2011 (diff | hist) . . (-1) . . 2009 AMC 8 Problems/Problem 25
- 11:14, 14 August 2011 (diff | hist) . . (+2,627) . . N 2009 AMC 8 Problems/Problem 25 (Created page with "==Problem== A one-cubic-foot cube is cut into four pieces by three cuts parallel to the top face of the cube. The first cube is <math> \tfrac12 </math> foot from the top face. ...")
- 11:09, 14 August 2011 (diff | hist) . . (+830) . . N 2009 AMC 8 Problems/Problem 24 (Created page with "==Problem== The letters <math>A</math>, <math>B</math>, <math>C</math> and <math>D</math> represent digits. If <math> \begin{tabular}{ccc}&A&B\\ +&C&A\\ \hline &D&A\end{tabular...")
- 11:00, 14 August 2011 (diff | hist) . . (-176) . . 2010 AMC 8 (Blanked the page)
- 10:51, 14 August 2011 (diff | hist) . . (+13) . . 2010 AMC 10B Problems/Problem 23
- 10:51, 14 August 2011 (diff | hist) . . (+530) . . N 2010 AMC 10B Problems/Problem 23 (Created page with "The entries in a <math>3x3</math> array include all the digits from 1 through 9, arranged so that the entries in every row and column are in increasing order. How many such array...")
- 10:47, 14 August 2011 (diff | hist) . . (+747) . . N 2003 AMC 10B Problems/Problem 24 (Created page with "==Problem== The first four terms in an arithmetic sequence are <math>x+y</math>,<math>x-y</math> ,<math>xy</math> , and <math>\frac{x}{y}</math>, in that order. What is the fi...")
- 10:45, 14 August 2011 (diff | hist) . . (+288) . . 2003 AMC 10B Problems/Problem 23
- 10:44, 14 August 2011 (diff | hist) . . (+691) . . N 2003 AMC 10B Problems/Problem 23 (Created page with "A regular octagon <math> ABCDEFGH </math> has an area of one square unit. What is the area of the rectangle <math> ABEF </math>? <asy> unitsize(8mm); defaultpen(linewidth(.8pt)+...")
- 15:32, 8 August 2011 (diff | hist) . . (+140) . . N AoPS Wiki:Problem of the Day/August 8, 2011 (Created page with "What is the sum of the coefficients of the polynomial <math> f(x) </math>, where <math> f(x) = x^{1000000}+x^{998001}+.....+x^{4}+x </math>?") (current)
- 21:57, 2 August 2011 (diff | hist) . . (+507) . . N 2009 AMC 8 Problems/Problem 23 (Created page with "On the last day of school, Mrs. Wonderful gave jelly beans to her class. She gave each boy as many jelly beans as there were boys in the class. She gave each girl as many jelly b...")
- 20:42, 1 August 2011 (diff | hist) . . (+815) . . N 2009 AMC 8 Problems/Problem 3 (Created page with "The graph shows the constant rate at which Suzanna rides her bike. If she rides a total of a half an hour at the same speed, how many miles would she have ridden? <asy> import g...")
- 20:38, 1 August 2011 (diff | hist) . . (+315) . . N 2009 AMC 8 Problems/Problem 2 (Created page with "On average, for every 4 sports cars sold at the local dealership, 7 sedans are sold. The dealership predicts that it will sell 28 sports cars next month. How many sedans does it ...")
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