3 March 2009

• 19:4119:41, 3 March 2009 diff hist +23 2009 AMC 12B Problems/Problem 16 No edit summary
• 14:1914:19, 3 March 2009 diff hist +4 2009 AMC 12B Problems/Problem 16 No edit summary

2 March 2009

• 20:3520:35, 2 March 2009 diff hist +1,633 N 2009 AMC 12B Problems/Problem 16 New page: == Problem == Trapezoid <math>ABCD</math> has <math>AD||BC</math>, <math>BD = 1</math>, <math>\angle DBA = 23^{\circ}</math>, and <math>\angle BDC = 46^{\circ}</math>. The ratio <math>BC:...
• 17:3617:36, 2 March 2009 diff hist +803 N 2009 AMC 12B Problems/Problem 13 New page: == Problem == Triangle <math>ABC</math> has <math>AB = 13</math> and <math>AC = 15</math>, and the altitude to <math>\overline{BC}</math> has length <math>12</math>. What is the sum of the...
• 16:0916:09, 2 March 2009 diff hist +670 N 2009 AMC 12B Problems/Problem 12 New page: == Problem == The fifth and eighth terms of a geometric sequence of real numbers are <math>7!</math> and <math>8!</math> respectively. What is the first term? <math>\mathrm{(A)}\ 60\qqu...
• 15:4515:45, 2 March 2009 diff hist +1,266 N 2009 AMC 12B Problems/Problem 9 New page: == Problem == Triangle <math>ABC</math> has vertices <math>A = (3,0)</math>, <math>B = (0,3)</math>, and <math>C</math>, where <math>C</math> is on the line <math>x + y = 7</math>. What i...

1 March 2009

• 20:1620:16, 1 March 2009 diff hist +1,989 N 2009 AMC 12B Problems/Problem 20 New page: == Problem == A convex polyhedron <math>Q</math> has vertices <math>V_1,V_2,\ldots,V_n</math>, and <math>100</math> edges. The polyhedron is cut by planes <math>P_1,P_2,\ldots,P_n</math> i...
• 19:3919:39, 1 March 2009 diff hist +46 N 2009 AMC 12B Problems/Problem 10 Redirecting to 2009 AMC 10B Problems/Problem 19
• 19:3819:38, 1 March 2009 diff hist +1,455 N 2009 AMC 10B Problems/Problem 19 New page: {{duplicate|2009 AMC 10B #19 and 2009 AMC 12B #10}} == Problem == A particular <math>12</math>-hour digital clock displays the hour and...
• 19:1719:17, 1 March 2009 diff hist +194 2009 AMC 12B Problems/Problem 14 No edit summary
• 19:1119:11, 1 March 2009 diff hist +46 N 2009 AMC 10B Problems/Problem 17 Redirecting to 2009 AMC 12B Problems/Problem 14 current
• 11:1511:15, 1 March 2009 diff hist +46 N 2009 AMC 12B Problems/Problem 8 Redirecting to 2009 AMC 10B Problems/Problem 15 current
• 11:1311:13, 1 March 2009 diff hist +1,140 N 2009 AMC 10B Problems/Problem 15 New page: {{duplicate|2009 AMC 10B #15 and 2009 AMC 12B #8}} == Problem == When a bucket is two-thirds full of water, the bucket and water weigh ...
• 00:0500:05, 1 March 2009 diff hist +46 N 2009 AMC 12B Problems/Problem 11 Redirecting to 2009 AMC 10B Problems/Problem 14 current
• 00:0300:03, 1 March 2009 diff hist +2,003 N 2009 AMC 10B Problems/Problem 14 New page: {{duplicate|2009 AMC 10B #14 and 2009 AMC 12B #11}} == Problem == On Monday, Millie puts a quart of seeds, <math>25\%</math> of which a...

28 February 2009

• 13:5413:54, 28 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 7 Redirecting to 2009 AMC 10B Problems/Problem 8 current
• 13:5213:52, 28 February 2009 diff hist +1,177 N 2009 AMC 10B Problems/Problem 8 New page: {{duplicate|2009 AMC 10B #8 and 2009 AMC 12B #7}} == Problem == In a certain year the price of gasoline rose by <math>20\%</math> durin...
• 11:3111:31, 28 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 6 Redirecting to 2009 AMC 10B Problems/Problem 7 current
• 11:3011:30, 28 February 2009 diff hist +1,100 N 2009 AMC 10B Problems/Problem 7 New page: {{duplicate|2009 AMC 10B #7 and 2009 AMC 12B #6}} == Problem == By inserting parentheses, it is possible to give the expression <cmath>...

27 February 2009

• 23:1723:17, 27 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 4 Redirecting to 2009 AMC 10B Problems/Problem 4 current
• 23:1523:15, 27 February 2009 diff hist +1,372 N 2009 AMC 10B Problems/Problem 4 New page: {{duplicate|2009 AMC 10B #4 and 2009 AMC 12B #4}} == Problem == A rectangular yard contains two flower beds in the shape of congruent i...
• 22:4822:48, 27 February 2009 diff hist +46 N 2009 AMC 12B Problems/Problem 18 Redirecting to 2009 AMC 10B Problems/Problem 23 current
• 22:4622:46, 27 February 2009 diff hist +46 N 2009 AMC 12B Problems/Problem 17 Redirecting to 2009 AMC 10B Problems/Problem 25 current
• 22:4422:44, 27 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 5 Redirecting to 2009 AMC 10B Problems/Problem 6 current
• 22:4222:42, 27 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 3 Redirecting to 2009 AMC 10B Problems/Problem 5 current
• 22:4022:40, 27 February 2009 diff hist −240 2009 AMC 12B Problems/Problem 1 Redirecting to 2009 AMC 10B Problems/Problem 1 current
• 22:3622:36, 27 February 2009 diff hist +45 N 2009 AMC 12B Problems/Problem 2 Redirecting to 2009 AMC 10B Problems/Problem 3 current
• 17:3417:34, 27 February 2009 diff hist +872 N 2009 AMC 10B Problems/Problem 6 New page: {{duplicate|2009 AMC 10B #6 and 2009 AMC 12B #5}} == Problem == Kiana has two older twin brothers. The product of their three ages is ...
• 17:1317:13, 27 February 2009 diff hist +678 N 2009 AMC 10B Problems/Problem 5 New page: {{duplicate|2009 AMC 10B #5 and 2009 AMC 12B #3}} == Problem == Twenty percent less than 60 is one-third more than what number? <math>...

26 February 2009

• 18:4218:42, 26 February 2009 diff hist +662 N 2009 AMC 10B Problems/Problem 21 New page: == Problem == What is the remainder when <math>3^0 + 3^1 + 3^2 + \cdots + 3^{2009}</math> is divided by 8? <math>\mathrm{(A)}\ 0\qquad \mathrm{(B)}\ 1\qquad \mathrm{(C)}\ 2\qquad \mathrm{...
• 18:0018:00, 26 February 2009 diff hist +15 2009 AMC 10B Problems/Problem 1 No edit summary
• 17:5917:59, 26 February 2009 diff hist +15 2009 AMC 10B Problems/Problem 3 No edit summary
• 17:5817:58, 26 February 2009 diff hist +15 2009 AMC 10B Problems/Problem 23 No edit summary
• 17:5617:56, 26 February 2009 diff hist +1,794 2009 AMC 10B Problems/Problem 25 No edit summary
• 15:0215:02, 26 February 2009 diff hist +178 2009 AMC 10B Problems/Problem 1 No edit summary
• 14:5814:58, 26 February 2009 diff hist +148 2009 AMC 10B Problems/Problem 3 No edit summary
• 14:5514:55, 26 February 2009 diff hist +152 2009 AMC 10B Problems/Problem 23 No edit summary
• 14:4314:43, 26 February 2009 diff hist 0 2009 AMC 10B Problems/Problem 25 No edit summary
• 14:3214:32, 26 February 2009 diff hist +152 2009 AMC 10B Problems/Problem 25 No edit summary
• 14:2314:23, 26 February 2009 diff hist +601 N 2009 AMC 10B Problems/Problem 25 New page: == Problem == Each face of a cube is given a single narrow stripe painted from the center of one edge to the center of the opposite edge. The choice of the edge pairing is made at random ...
• 14:0114:01, 26 February 2009 diff hist +1,508 N 2009 AMC 10B Problems/Problem 23 New page: == Problem == Rachel and Robert run on a circular track. Rachel runs counterclockwise and completes a lap every 90 seconds, and Robert runs clockwise and completes a lap every 80 seconds....
• 09:5409:54, 26 February 2009 diff hist +613 N 2009 AMC 10B Problems/Problem 3 New page: == Problem == Paula the painter had just enough paint for 30 identically sized rooms. Unfortunately, on the way to work, three cans of paint fell off her truck, so she had only enough pai...
• 09:3609:36, 26 February 2009 diff hist +543 N 2009 AMC 10B Problems/Problem 1 New page: == Problem == Each morning of her five-day workweek, Jane bought either a 50-cent muffin or a 75-cent bagel. Her total cost for the week was a whole number of dollars, How many bagels di...

18 February 2009

• 20:1520:15, 18 February 2009 diff hist 0 2009 AMC 10A Problems →Problem 7
• 20:1320:13, 18 February 2009 diff hist 0 2009 AMC 10A Problems/Problem 7 →Problem
• 20:1120:11, 18 February 2009 diff hist +466 N 2009 AMC 10A Problems/Problem 7 New page: == Problem == A carton contains milk that is <math>2</math>% fat, an amount that is <math>40</math>% less fat than the amount contained in a carton of whole milk. What is the percentage of...
• 20:0720:07, 18 February 2009 diff hist +764 N 2009 AMC 10A Problems/Problem 6 New page: == Problem == A circle of radius <math>2</math> is inscribed in a semicircle, as shown. The area inside the semicircle but outside the circle is shaded. What fraction of the semicircle's ...
• 20:0020:00, 18 February 2009 diff hist +651 N 2009 AMC 10A Problems/Problem 4 New page: ==Problem== Eric plans to compete in a triathlon. He can average <math>2</math> miles per hour in the <math>\frac{1}{4}</math>-mile swim and <math>6</math> miles per hour in the <math>3</m...
• 19:4919:49, 18 February 2009 diff hist +19 AMC 12 Problems and Solutions No edit summary
• 19:4719:47, 18 February 2009 diff hist −1 m 2009 AMC 10A Problems No edit summary