User contributions
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- 15:53, 25 January 2009 (diff | hist) . . (+1,843) . . N 2004 AMC 10B Problems/Problem 13 (New page: == Problem == In the United States, coins have the following thicknesses: penny, <math>1.55</math> mm; nickel, <math>1.95</math> mm; dime, <math>1.35</math> mm; quarter, <math>1.75</math> ...)
- 20:13, 24 January 2009 (diff | hist) . . (+1,193) . . N 2004 AMC 10B Problems/Problem 14 (New page: == Problem == A bag initially contains red marbles and blue marbles only, with more blue than red. Red marbles are added to the bag until only <math>\frac{1}{3}</math> of the marbles in t...)
- 19:34, 24 January 2009 (diff | hist) . . (+1,289) . . N 2004 AMC 10B Problems/Problem 22 (New page: ==Problem== A triangle with sides of 5, 12, and 13 has both an inscribed and a circumscribed circle. What is the distance between the centers of those circles? <math> \mathrm{(A) \ } \fra...)
- 18:50, 24 January 2009 (diff | hist) . . (+4) . . m 2004 AMC 10B Problems/Problem 15
- 18:50, 24 January 2009 (diff | hist) . . (+1,339) . . N 2004 AMC 10B Problems/Problem 15 (New page: ==Problem== Patty has <math>20</math> coins consisting of nickels and dimes. If her nickels were dimes and her dimes were nickels, she would have <math>70</math> cents more. How much are ...)
- 18:13, 24 January 2009 (diff | hist) . . (+1,497) . . N 2004 AMC 10B Problems/Problem 16 (New page: == Problem == Three circles of radius <math>1</math> are externally tangent to each other and internally tangent to a larger circle. What is the radius of the large circle? <math> \mathr...)
- 16:27, 24 January 2009 (diff | hist) . . (+1,765) . . N 2004 AMC 10B Problems/Problem 17 (New page: ==Problem== The two digits in Jack's age are the same as the digits in Bill's age, but in reverse order. In five years Jack will be twice as old as Bill will be then. What is the differen...)
- 16:15, 24 January 2009 (diff | hist) . . (-3) . . m 2004 AMC 10B Problems (→Problem 17)
- 15:58, 24 January 2009 (diff | hist) . . (+4) . . m 2004 AMC 10B Problems/Problem 19
- 15:58, 24 January 2009 (diff | hist) . . (+1,804) . . N 2004 AMC 10B Problems/Problem 19 (New page: ==Problem== In the sequence <math>2001</math>, <math>2002</math>, <math>2003</math>, <math>\ldots</math> , each term after the third is found by subtracting the previous term from the sum...)
- 15:42, 24 January 2009 (diff | hist) . . (0) . . m 2004 AMC 10B Problems (→Problem 19)
- 15:39, 24 January 2009 (diff | hist) . . (+1,469) . . N 2004 AMC 10B Problems/Problem 21 (New page: ==Problem== Let <math>1</math>; <math>4</math>; <math>\ldots</math> and <math>9</math>; <math>16</math>; <math>\ldots</math> be two arithmetic progressions. The set <math>S</math> is the ...)
- 15:20, 24 January 2009 (diff | hist) . . (+1,970) . . N 2004 AMC 10B Problems/Problem 23 (New page: ==Problem== Each face of a cube is painted either red or blue, each with probability 1/2. The color of each face is determined independently. What is the probability that the painted cube ...)
- 15:02, 24 January 2009 (diff | hist) . . (+675) . . N 2004 AMC 10B Problems/Problem 3 (New page: ==Problem== At each basketball practice last week, Jenny made twice as many free throws as she made at the previous practice. At her fifth practice she made 48 free throws. How many free t...)
- 15:01, 24 January 2009 (diff | hist) . . (+538) . . N 2004 AMC 10B Problems/Problem 2 (New page: ==Problem== How many two-digit positive integers have at least one 7 as a digit? <math> \mathrm{(A) \ } 10 \qquad \mathrm{(B) \ } 18\qquad \mathrm{(C) \ } 19 \qquad \mathrm{(D) \ } 20\qq...)
- 14:54, 24 January 2009 (diff | hist) . . (+701) . . 2003 AMC 10A Problems/Problem 25 (formatting and notes)
- 14:38, 24 January 2009 (diff | hist) . . (+525) . . 2002 AMC 10B Problems/Problem 11
- 14:27, 24 January 2009 (diff | hist) . . (+1,548) . . 2002 AMC 10A Problems/Problem 25 (alternate solution)
- 13:38, 24 January 2009 (diff | hist) . . (+739) . . 2002 AMC 10A Problems/Problem 21 (→Solution)
- 13:15, 24 January 2009 (diff | hist) . . (+214) . . m 2002 AMC 10A Problems/Problem 15
- 12:52, 24 January 2009 (diff | hist) . . (+13) . . m 2002 AMC 10A Problems/Problem 10 (→Solution 1)
- 12:51, 24 January 2009 (diff | hist) . . (+34) . . 2002 AMC 10A Problems/Problem 10 (fixed a mistake)
- 12:37, 24 January 2009 (diff | hist) . . (+913) . . 2002 AMC 10A Problems/Problem 3
- 12:19, 24 January 2009 (diff | hist) . . (+382) . . m 2002 AMC 10A Problems/Problem 2
- 12:10, 24 January 2009 (diff | hist) . . (+1,341) . . 2001 AMC 10 Problems
- 11:48, 24 January 2009 (diff | hist) . . (+2) . . m 2000 AMC 10 Problems/Problem 18 (→Solution)
- 11:48, 24 January 2009 (diff | hist) . . (+1,275) . . 2000 AMC 10 Problems/Problem 18 (→Solution)
- 11:21, 24 January 2009 (diff | hist) . . (-1) . . m 2000 AMC 10 Problems/Problem 11 (→Solution)
- 11:16, 24 January 2009 (diff | hist) . . (+13) . . m 2000 AMC 10 Problems/Problem 8 (→Solution)
- 11:16, 24 January 2009 (diff | hist) . . (+22) . . m 2000 AMC 10 Problems/Problem 8 (→Solution)
- 11:03, 24 January 2009 (diff | hist) . . (+70) . . m 2000 AMC 10 Problems/Problem 5 (→Solution)
- 12:00, 15 January 2009 (diff | hist) . . (+1,887) . . N 1999 AHSME Problems/Problem 16 (New page: == Problem == What is the radius of a circle inscribed in a rhombus with diagonals of length <math>10</math> and <math>24</math>? <math> \mathrm{(A) \ }4 \qquad \mathrm{(B) \ }\frac {58}...)
- 11:39, 15 January 2009 (diff | hist) . . (+602) . . 1995 AHSME Problems/Problem 27 (→Solution)
- 11:28, 15 January 2009 (diff | hist) . . (+2,815) . . N 1999 AHSME Problems/Problem 22 (New page: == Problem == The graphs of <math>y = -|x-a| + b</math> and <math>y = |x-c| + d</math> intersect at points <math>(2,5)</math> and <math>(8,3)</math>. Find <math>a+c</math>. <math> \mathrm...)
- 07:37, 12 January 2009 (diff | hist) . . (+1,941) . . N 1999 AHSME Problems/Problem 23 (New page: == Problem == The equiangular convex hexagon <math>ABCDEF</math> has <math>AB = 1, BC = 4, CD = 2,</math> and <math>DE = 4.</math> The area of the hexagon is <math> \mathrm{(A) \ } \frac ...)
- 13:13, 11 January 2009 (diff | hist) . . (+2,258) . . N 1999 AHSME Problems/Problem 26 (New page: ==Problem== Three non-overlaping regular plane polygons, at least two of which are congruent, all have sides of length <math>1</math>. The polygons meet at a point <math>A</math> in such ...)
- 12:25, 11 January 2009 (diff | hist) . . (+367) . . 2000 AMC 10 Problems/Problem 19
- 12:20, 11 January 2009 (diff | hist) . . (+11) . . m 2000 AMC 10 Problems/Problem 20 (→Solution)
- 12:18, 11 January 2009 (diff | hist) . . (+1,100) . . 2000 AMC 10 Problems/Problem 20
- 11:41, 11 January 2009 (diff | hist) . . (+1,726) . . 2000 AMC 10 Problems/Problem 25
- 11:00, 11 January 2009 (diff | hist) . . (+1,532) . . 2000 AMC 10 Problems/Problem 22
- 10:51, 11 January 2009 (diff | hist) . . (+2,144) . . 2000 AMC 10 Problems/Problem 21
- 10:28, 11 January 2009 (diff | hist) . . (+1,905) . . 2000 AMC 10 Problems/Problem 23
- 09:53, 11 January 2009 (diff | hist) . . (+1,027) . . 2000 AMC 10 Problems/Problem 24
- 18:00, 7 January 2009 (diff | hist) . . (+1,146) . . N 1999 AHSME Problems/Problem 9 (New page: == Problem == Before Ashley started a three-hour drive, her car's odometer reading was 29792, a palindrome. (A palindrome is a number that reads te same way from left to right as it does f...)
- 17:37, 7 January 2009 (diff | hist) . . (+1,545) . . N 1999 AHSME Problems/Problem 17 (New page: == Problem == Let <math>P(x)</math> be a polynomial such that when <math>P(x)</math> is divided by <math>x-19</math>, the remaidner is <math>99</math>, and when <math>P(x)</math> is divide...)
- 16:44, 7 January 2009 (diff | hist) . . (+1,835) . . N 1999 AHSME Problems/Problem 18 (New page: == Problem == How many zeros does <math>f(x) = \cos(\log x)</math> have on the interval <math>0 < x < 1</math>? <math> \mathrm{(A) \ } 0 \qquad \mathrm{(B) \ } 1 \qquad \mathrm{(C) \ } 2 ...)
- 16:00, 7 January 2009 (diff | hist) . . (+902) . . N 1999 AHSME Problems/Problem 20 (New page: == Problem == The sequence <math>a_{1},a_{2},a_{3},\ldots</math> statisfies <math>a_{1} = 19,a_{9} = 99</math>, and, for all <math>n\geq 3</math>, <math>a_{n}</math> is the arithmetic mean...)
- 15:10, 7 January 2009 (diff | hist) . . (+1,454) . . N 1999 AHSME Problems/Problem 21 (New page: == Problem == A circle is circumscribed about a triangle with sides <math>20,21,</math> and <math>29,</math> thus dividing the interior of the circle into four regions. Let <math>A,B,</mat...)
- 15:03, 7 January 2009 (diff | hist) . . (+947) . . N 1999 AHSME Problems/Problem 24 (New page: == Problem == Six points on a circle are given. Four of the chords joining pairs of the six points are selected at random. What is the probability that the four chords form a convex quadri...)
- 14:58, 7 January 2009 (diff | hist) . . (0) . . m 1999 AHSME Problems (→Problem 24)
- 14:05, 7 January 2009 (diff | hist) . . (+2,469) . . N 1999 AHSME Problems/Problem 28 (New page: == Problem == Let <math>x_1, x_2, \ldots , x_n</math> be a sequence of integers such that (i) <math>-1 \le x_i \le 2</math> for <math>i = 1,2, \ldots n</math> (ii) <math>x_1 + \cdots + x_...)
- 13:28, 7 January 2009 (diff | hist) . . (0) . . m 1999 AHSME Problems (→Problem 28)
- 13:12, 7 January 2009 (diff | hist) . . (+914) . . N 1998 AHSME Problems/Problem 11 (New page: == Problem == Let <math>R</math> be a rectangle. How many circles in the plane of <math>R</math> have a diameter both of whose endpoints are vertices of <math>R</math>? <math> \mathrm{(A)...)
- 12:59, 7 January 2009 (diff | hist) . . (+1,242) . . N 1998 AHSME Problems/Problem 13 (New page: == Problem == Walter rolls four standard six-sided dice and finds that the product of the numbers of the upper faces is <math>144</math>. Which of he following could '''not ''' be the sum ...)
- 12:55, 7 January 2009 (diff | hist) . . (0) . . 1998 AHSME Problems (fixed a bug in the options)
- 12:47, 7 January 2009 (diff | hist) . . (+1,099) . . N 1998 AHSME Problems/Problem 18 (New page: == Problem == A right circular cone of volume <math>A</math>, a right circular cylinder of volume <math>M</math>, and a sphere of volume <math>C</math> all have the same radius, and the co...)
- 12:08, 7 January 2009 (diff | hist) . . (+1,843) . . N 1998 AHSME Problems/Problem 19 (New page: == Problem == How many triangles have area <math>10</math> and vertices at <math>(-5,0),(5,0)</math> and <math>(5\cos \theta, 5\sin \theta)</math> for some angle <math>\theta</math>? <mat...)
- 11:52, 7 January 2009 (diff | hist) . . (+2,095) . . N 1998 AHSME Problems/Problem 20 (New page: == Problem == Three cards, each with a positive integer written on it, are lying face-down on a table. Casey, Stacy, and Tracy are told that : (a) the numbers are all different, : (b) the...)
- 11:30, 7 January 2009 (diff | hist) . . (+1,195) . . N 1998 AHSME Problems/Problem 21 (New page: == Problem == In an <math>h-</math> meter race, Sunny is exactly <math>d</math> meters ahead of Windy when Sunny finishes the race. The next time they race, Sunny sportingly starts <math>d...)
- 11:23, 7 January 2009 (diff | hist) . . (0) . . m 1998 AHSME Problems (→Problem 21)
- 11:19, 7 January 2009 (diff | hist) . . (+1,222) . . N 1998 AHSME Problems/Problem 23 (New page: == Problem == The graphs of <math>x^2 + y^2 = 4 + 12x + 6y</math> and <math>x^2 + y^2 = k + 4x + 12y</math> intersect when <math>k</math> satisfies <math>a \le k \le b</math>, and for no o...)
- 10:56, 7 January 2009 (diff | hist) . . (+3,155) . . N 1998 AHSME Problems/Problem 25 (New page: == Problem == A piece of graph paper is folded once so that <math>(0,2)</math> is matched with <math>(4,0)</math>, and <math>(7,3)</math> is matched with <math>(m,n)</math>. Find <math>m+n...)
- 09:23, 7 January 2009 (diff | hist) . . (+2,909) . . N 1998 AHSME Problems/Problem 30 (New page: == Problem == For each positive integer <math>n</math>, let <center><math>a_n = \frac{(n+9)!}{(n-1)!}</math></center> Let <math>k</math> denote the smallest positive integer for which t...)
- 08:40, 7 January 2009 (diff | hist) . . (+345) . . 1995 AHSME Problems/Problem 30 (→Solution)
- 08:34, 7 January 2009 (diff | hist) . . (+897) . . 1995 AHSME Problems/Problem 30 (→Solution)
- 16:52, 6 January 2009 (diff | hist) . . (+79) . . N Talk:2000 AMC 12 Problems/Problem 22 (bug report) (current)
- 16:29, 6 January 2009 (diff | hist) . . (+707) . . 2002 AMC 12B Problems/Problem 12 (alternate solution)
- 16:20, 6 January 2009 (diff | hist) . . (+512) . . 2002 AMC 12B Problems/Problem 9 (alternate solution)
- 16:14, 6 January 2009 (diff | hist) . . (+638) . . 2002 AMC 12B Problems/Problem 8
- 10:58, 6 January 2009 (diff | hist) . . (-311) . . 2003 AMC 12A Problems/Problem 21 (shortened)
- 10:32, 6 January 2009 (diff | hist) . . (+575) . . N 2004 AMC 12B Problems/Problem 8 (New page: == Problem == A grocer makes a display of cans in which the top row has one can and each lower row has two more cans than the row above it. If the display contains 100 cans, how many rows ...)
- 10:30, 6 January 2009 (diff | hist) . . (+733) . . N 2004 AMC 12B Problems/Problem 7 (New page: == Problem 7 == A square has sides of length 10, and a circle centered at one of its vertices has radius 10. What is the area of the union of the regions enclosed by the square and the cir...)
- 10:26, 6 January 2009 (diff | hist) . . (-4) . . m 2004 AMC 12B Problems (→Problem 7)
- 10:25, 6 January 2009 (diff | hist) . . (+62) . . m 2004 AMC 12B Problems/Problem 6
- 10:25, 6 January 2009 (diff | hist) . . (+745) . . N 2004 AMC 12B Problems/Problem 6 (New page: == Problem == Minneapolis-St. Paul International Airport is 8 miles southwest of downtown St. Paul and 10 miles southeast of downtown Minneapolis. Which of the following is closest to the ...)
- 10:21, 6 January 2009 (diff | hist) . . (-2) . . 2004 AMC 12B Problems (→Problem 6)
- 10:20, 6 January 2009 (diff | hist) . . (+1,149) . . N 2004 AMC 12B Problems/Problem 5 (New page: == Problem == On a trip from the United States to Canada, Isabella took <math>d</math> U.S. dollars. At the border she exchanged them all, receiving 10 Canadian dollars for every 7 U.S. do...)
- 10:08, 6 January 2009 (diff | hist) . . (+76) . . m 2004 AMC 12B Problems/Problem 4 (→Solution)
- 10:07, 6 January 2009 (diff | hist) . . (+878) . . N 2004 AMC 12B Problems/Problem 4 (New page: == Problem == An integer <math>x</math>, with <math>10\leq x\leq 99</math>, is to be chosen. If all choices are equally likely, what is the probability that at least one digit of <math>x<...)
- 07:26, 6 January 2009 (diff | hist) . . (+438) . . N 2004 AMC 12B Problems/Problem 3 (New page: == Problem == If <math>x</math> and <math>y</math> are positive integers for which <math>2^x3^y=1296</math>, what is the value of <math>x+y</math>? <math>(\mathrm {A}) 8\qquad (\mathrm {B...)
- 07:23, 6 January 2009 (diff | hist) . . (+976) . . N 2004 AMC 12B Problems/Problem 2 (New page: == Problem 2 == In the expression <math>c\cdot a^b-d</math>, the values of <math>a</math>, <math>b</math>, <math>c</math>, and <math>d</math> are 0, 1, 2, and 3, although not necessarily i...)
- 07:14, 6 January 2009 (diff | hist) . . (+1) . . m 2004 AMC 12B Problems (→Problem 4)
- 06:34, 6 January 2009 (diff | hist) . . (0) . . m 2004 AMC 12A Problems (typo)
- 06:30, 6 January 2009 (diff | hist) . . (+303) . . 2004 AMC 12A Problems/Problem 15 (beautified)
- 06:20, 6 January 2009 (diff | hist) . . (+390) . . 2004 AMC 12A Problems/Problem 11 (alternate solution)
- 06:11, 6 January 2009 (diff | hist) . . (+187) . . N Talk:2004 AMC 12A Problems/Problem 4 (New page: :Draw a tree diagram and see that the answer can be found in the sum of 6 + 6 granddaughters, 5 + 5 daughters, and 4 more daughters. Try as I might, I don't get this. Can it be deleted?) (current)
- 19:31, 5 January 2009 (diff | hist) . . (-22) . . m 2006 AMC 12B Problems/Problem 9 (→Solution 2)
- 19:30, 5 January 2009 (diff | hist) . . (+331) . . 2006 AMC 12B Problems/Problem 9 (alternate solution)
- 16:42, 5 January 2009 (diff | hist) . . (+432) . . 2008 AMC 12A Problems/Problem 6 (alternate solution)
- 15:13, 5 January 2009 (diff | hist) . . (-145) . . 2007 AMC 12B Problems/Problem 24 (rewrote to make it more clear and short)
- 14:51, 5 January 2009 (diff | hist) . . (+311) . . 2007 AMC 12B Problems/Problem 18 (filled in a part of a proof)
- 14:33, 5 January 2009 (diff | hist) . . (+490) . . 2007 AMC 12B Problems/Problem 15 (alternate solution)
- 09:54, 5 January 2009 (diff | hist) . . (+144) . . 2007 AMC 12A Problems/Problem 25 (corrected an argument)
- 09:47, 5 January 2009 (diff | hist) . . (+986) . . 2007 AMC 12A Problems/Problem 22 (new solution based on observing the problem modulo 9)
- 09:18, 5 January 2009 (diff | hist) . . (+2) . . 2007 AMC 12A Problems/Problem 16 (fix)
- 09:06, 5 January 2009 (diff | hist) . . (+10) . . m 2007 AMC 12A Problems (formatting)
- 09:06, 5 January 2009 (diff | hist) . . (-12) . . m 2007 AMC 12A Problems (formatting)
- 15:22, 27 December 2008 (diff | hist) . . (+2) . . m 1989 AIME Problems/Problem 1 (→Solution 2)
- 15:21, 27 December 2008 (diff | hist) . . (+313) . . 1989 AIME Problems/Problem 1 (alternate solution)
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