User contributions
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- 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 ...")
- 20:38, 1 August 2011 (diff | hist) . . (+301) . . N 2009 AMC 8 Problems/Problem 1 (Created page with "Bridget bought a bag of apples at the grocery store. She gave half of the apples to Ann. Then she gave Cassie 3 apples, keeping 4 apples for herself. How many apples did Bridget ...")
- 20:58, 28 July 2011 (diff | hist) . . (+528) . . N 2000 AMC 8 Problems/Problem 25 (Created page with "The area of rectangle <math>ABCD</math> is <math>72</math>. If point <math>A</math> and the midpoints of <math> \overline{BC} </math> and <math> \overline{CD} </math> are joined ...")
- 20:57, 28 July 2011 (diff | hist) . . (+412) . . N 2000 AMC 8 Problems/Problem 23 (Created page with "There is a list of seven numbers. The average of the first four numbers is <math>5</math>, and the average of the last four numbers is <math>8</math>. If the average of all seven...")
- 20:56, 28 July 2011 (diff | hist) . . (+544) . . N 2000 AMC 8 Problems/Problem 24 (Created page with "If <math> \angle A = 20^\circ </math> and <math> \angle AFG =\angle AGF </math>, then <math> \angle B+\angle D = </math> <asy> pair A,B,C,D,EE,F,G; A = (0,0); B = (9,4); C = (21...")
- 20:55, 28 July 2011 (diff | hist) . . (+703) . . N 2000 AMC 8 Problems/Problem 22 (Created page with "A cube has edge length <math>2</math>. Suppose that we glue a cube of edge length <math>1</math> on top of the big cube so that one of its faces rests entirely on the top face of...")
- 20:55, 28 July 2011 (diff | hist) . . (+288) . . N 2000 AMC 8 Problems/Problem 21 (Created page with "Keiko tosses one penny and Ephraim tosses two pennies. The probability that Ephraim gets the same number of heads that Keiko gets is <math> \text{(A)}\ \frac{1}{4}\qquad\text{(B...")
- 20:54, 28 July 2011 (diff | hist) . . (-5) . . 2000 AMC 8 Problems/Problem 20
- 20:53, 28 July 2011 (diff | hist) . . (+297) . . N 2000 AMC 8 Problems/Problem 20 (Created page with "You have nine coins: a collection of pennies, nickels, dimes, and quarters having a total value of <math> $1.02 </math>, with at least one coin of each type. How many dimes m...")
- 20:53, 28 July 2011 (diff | hist) . . (+575) . . N 2000 AMC 8 Problems/Problem 19 (Created page with "Three circular arcs of radius <math>5</math> units bound the region shown. Arcs <math>AB</math> and <math>AD</math> are quarter-circles, and arc <math>BCD</math> is a semicircle....")
- 20:51, 28 July 2011 (diff | hist) . . (+863) . . N 2000 AMC 8 Problems/Problem 18 (Created page with "Consider these two geoboard quadrilaterals. Which of the following statements is true? <asy> for (int a = 0; a < 5; ++a) { for (int b = 0; b < 5; ++b) { dot((a,b)); } } draw((0,...")
- 20:49, 28 July 2011 (diff | hist) . . (+340) . . N 2000 AMC 8 Problems/Problem 17 (Created page with "The operation <math> \otimes </math> is defined for all nonzero numbers by <math> a\otimes b =\frac{a^{2}}{b} </math>. Determine <math> [(1\otimes 2)\otimes 3]-[1\otimes (2\otime...")
- 20:48, 28 July 2011 (diff | hist) . . (+755) . . N 2000 AMC 8 Problems/Problem 15 (Created page with "Triangles <math> ABC </math>, <math>ABD</math>, and <math>EFG</math> are all equilateral. Points <math>D</math> and <math>G</math> are midpoints of <math> \overline{AC} </math> a...")
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