27 May 2011

• 18:2918:29, 27 May 2011 diff hist 0 2007 AMC 10B Problems/Problem 4 →Solution
• 18:2818:28, 27 May 2011 diff hist +2,711 N 2007 AMC 10B Problems/Problem 19 Created page with '==Problem 19== The wheel shown is spun twice, and the randomly determined numbers opposite the pointer are recorded. The first number is divided by <math>4,</math> and the secon…'
• 17:2917:29, 27 May 2011 diff hist +944 N 2007 AMC 10B Problems/Problem 8 Created page with '==Problem 8== On the trip home from the meeting where this AMC10 was constructed, the Contest Chair noted that his airport parking receipt had digits of the form <math>bbcac,</m…'
• 17:0717:07, 27 May 2011 diff hist +1,102 N 2007 AMC 10B Problems/Problem 7 Created page with '==Problem 7== All sides of the convex pentagon <math>ABCDE</math> are of equal length, and <math>\angle A= \angle B = 90^\circ.</math> What is the degree measure of <math>\angle…'
• 16:3116:31, 27 May 2011 diff hist +1,145 N 2007 AMC 10B Problems/Problem 6 Created page with '==Problem 6== The <math>2007 AMC10</math> will be scored by awarding <math>6</math> points for each correct response, <math>0</math> points for each incorrect response, and <mat…'
• 16:2516:25, 27 May 2011 diff hist +852 N 2007 AMC 10B Problems/Problem 4 Created page with '==Problem 4== The point <math>O</math> is the center of the circle circumscribed about <math>\triangle ABC,</math> with <math>\angle BOC=120^\circ</math> and <math>\angle AOB=14…'
• 16:1416:14, 27 May 2011 diff hist +373 N 2007 AMC 10B Problems/Problem 2 Created page with '==Problem 2== Define the operation <math>\star</math> by <math>a \star b = (a+b)b.</math> What is <math>(3 \star 5) - (5 \star 3)?</math> <math>\textbf{(A) } -16 \qquad\textbf{…'
• 16:0616:06, 27 May 2011 diff hist +202 m 2007 AMC 10B Problems →Problem 19
• 15:5815:58, 27 May 2011 diff hist +1,081 2007 AMC 10B Problems added picture to 19
• 15:2915:29, 27 May 2011 diff hist +789 2007 AMC 10B Problems added picture to 18
• 15:1315:13, 27 May 2011 diff hist +12,700 N 2007 AMC 10B Problems no pictures yet
• 14:1014:10, 27 May 2011 diff hist +451 2002 AMC 10B Problems →Problem 24
• 14:0814:08, 27 May 2011 diff hist +342 2002 AMC 10B Problems →Problem 23
• 14:0614:06, 27 May 2011 diff hist +480 2002 AMC 10B Problems →Problem 21
• 14:0414:04, 27 May 2011 diff hist +283 2002 AMC 10B Problems →Problem 20
• 14:0314:03, 27 May 2011 diff hist +348 2002 AMC 10B Problems →Problem 19
• 13:5913:59, 27 May 2011 diff hist +65 m 2002 AMC 10B Problems No edit summary
• 13:5713:57, 27 May 2011 diff hist +818 2002 AMC 10B Problems →Problem 5
• 13:4313:43, 27 May 2011 diff hist +2 m 2002 AMC 10B Problems →Problem 4
• 13:4213:42, 27 May 2011 diff hist +13 m 2002 AMC 10B Problems →Problem 3
• 13:4213:42, 27 May 2011 diff hist +26 2002 AMC 10B Problems →Problem 2
• 13:4113:41, 27 May 2011 diff hist +40 m 2002 AMC 10B Problems →Problem 1

26 May 2011

• 23:5523:55, 26 May 2011 diff hist +4 2003 AMC 10B Problems →Problem 22
• 23:5523:55, 26 May 2011 diff hist +12,168 N 2003 AMC 10B Problems no pictures yet
• 18:5518:55, 26 May 2011 diff hist +1,398 N 2011 AMC 10B Problems/Problem 19 Created page with '== Problem 19 == What is the product of all the roots of the equation <cmath>\sqrt{5 | x | + 8} = \sqrt{x^2 - 16}.</cmath> <math> \textbf{(A)}\ -64 \qquad\textbf{(B)}\ -24 \qqu…'
• 18:3518:35, 26 May 2011 diff hist +483 2011 AMC 10B Problems →Problem 17
• 18:3518:35, 26 May 2011 diff hist +202 2011 AMC 10B Problems/Problem 17 No edit summary
• 18:0218:02, 26 May 2011 diff hist +76 2011 AMC 10B Problems →Problem 8

25 May 2011

• 23:5323:53, 25 May 2011 diff hist +1,546 N 2011 AMC 10B Problems/Problem 17 Created page with '== Problem 17 == In the given circle, the diameter <math>\overline{EB}</math> is parallel to <math>\overline{DC}</math>, and <math>\overline{AB}</math> is parallel to <math>\ove…'
• 23:1523:15, 25 May 2011 diff hist +1,130 2011 AMC 10B Problems/Problem 18 No edit summary
• 22:3022:30, 25 May 2011 diff hist +2,225 N 2011 AMC 10B Problems/Problem 16 Created page with '== Problem 16 == A dart board is a regular octagon divided into regions as shown. Suppose that a dart thrown at the board is equally likely to land anywhere on the board. What i…'
• 20:0320:03, 25 May 2011 diff hist +1,266 N 2011 AMC 10B Problems/Problem 15 Created page with '== Problem 15 == Let <math>@</math> denote the "averaged with" operation: <math>a @ b = \frac{a+b}{2}</math>. Which of the following distributive laws hold for all numbers <math…'
• 19:5019:50, 25 May 2011 diff hist +718 N 2011 AMC 10B Problems/Problem 14 Created page with '== Problem 14 == A rectangular parking lot has a diagonal of <math>25</math> meters and an area of <math>168</math> square meters. In meters, what is the perimeter of the parkin…'
• 19:4419:44, 25 May 2011 diff hist +852 N 2011 AMC 10B Problems/Problem 13 Created page with '== Problem 13 == Two real numbers are selected independently at random from the interval <math>[-20, 10]</math>. What is the probability that the product of those numbers is gre…'
• 19:3819:38, 25 May 2011 diff hist +326 2011 AMC 10B Problems/Problem 11 No edit summary
• 19:2919:29, 25 May 2011 diff hist +1,470 N 2011 AMC 10B Problems/Problem 9 Created page with '== Problem 9 == The area of <math>\triangle</math><math>EBD</math> is one third of the area of <math>3-4-5</math> <math>\triangle</math><math>ABC</math>. Segment <math>DE</math>…'
• 19:0919:09, 25 May 2011 diff hist +49 2011 AMC 10B Problems →Problem 9
• 18:4818:48, 25 May 2011 diff hist +1,036 N 2011 AMC 10B Problems/Problem 7 Created page with '== Problem 7 == The sum of two angles of a triangle is <math>\frac{6}{5}</math> of a right angle, and one of these two angles is <math>30^{\circ}</math> larger than the other. W…'
• 18:3718:37, 25 May 2011 diff hist +763 N 2011 AMC 10B Problems/Problem 6 Created page with '== Problem 6 == On Halloween Casper ate <math>\frac{1}{3}</math> of his candies and then gave <math>2</math> candies to his brother. The next day he ate <math>\frac{1}{3}</math>…'
• 18:1618:16, 25 May 2011 diff hist +782 N 2011 AMC 10B Problems/Problem 5 Created page with '== Problem 5 == In multiplying two positive integers <math>a</math> and <math>b</math>, Ron reversed the digits of the two-digit number <math>a</math>. His erroneous product was…'
• 18:0918:09, 25 May 2011 diff hist +34 2011 AMC 10B Problems/Problem 4 No edit summary
• 18:0018:00, 25 May 2011 diff hist +146 2011 AMC 10B Problems/Problem 3 No edit summary
• 17:5717:57, 25 May 2011 diff hist +226 2011 AMC 10B Problems/Problem 2 No edit summary
• 17:5317:53, 25 May 2011 diff hist +255 2011 AMC 10B Problems/Problem 1 No edit summary
• 00:5500:55, 25 May 2011 diff hist +334 2011 AMC 10B Problems →Problem 16
• 00:4800:48, 25 May 2011 diff hist +428 2011 AMC 10B Problems →Problem 9
• 00:2800:28, 25 May 2011 diff hist +1 m 2011 AMC 10B Problems →Problem 25
• 00:2500:25, 25 May 2011 diff hist +2 2011 AMC 10B Problems →Problem 25
• 00:2200:22, 25 May 2011 diff hist +13 2011 AMC 10B Problems →Problem 23
• 00:2100:21, 25 May 2011 diff hist +12,185 N 2011 AMC 10B Problems Created page with '== Problem 1 == What is <cmath>\dfrac{2+4+6}{1+3+5} - \dfrac{1+3+5}{2+4+6}</cmath>? <math> \textbf{(A)}\ -1\qquad\textbf{(B)}\ \frac{5}{36}\qquad\textbf{(C)}\ \frac{7}{12}\qqua…'