User contributions
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- 20:17, 16 August 2011 (diff | hist) . . (+212) . . N 1979 USAMO Problems/Problem 5 (Created page with "==Problem== Let <math>A_1,A_2,...,A_{n+1}</math> be distinct subsets of <math>[n]</math> with <math>|A_1|=|A_2|=\cdots =|A_n|=3</math>. Prove that <math>|A_i\cap A_j|=1</math> ...")
- 20:17, 16 August 2011 (diff | hist) . . (+1,352) . . N 1979 USAMO Problems/Problem 4 (Created page with "==Problem== <math>P</math> lies between the rays <math>OA</math> and <math>OB</math>. Find <math>Q</math> on <math>OA</math> and <math>R</math> on <math>OB</math> collinear with...")
- 20:16, 16 August 2011 (diff | hist) . . (+432) . . N 1979 USAMO Problems/Problem 3 (Created page with "==Problem== <math>a_1, a_2, \ldots, a_n</math> is an arbitrary sequence of positive integers. A member of the sequence is picked at random. Its value is <math>a</math>. Another...")
- 20:13, 16 August 2011 (diff | hist) . . (+409) . . N 1979 USAMO Problems/Problem 2 (Created page with "==Problem== <math>N</math> is the north pole. <math>A</math> and <math>B</math> are points on a great circle through <math>N</math> equidistant from <math>N</math>. <math>C</mat...")
- 20:02, 16 August 2011 (diff | hist) . . (+201) . . 1978 USAMO Problems (→Problem 5)
- 20:02, 16 August 2011 (diff | hist) . . (+181) . . 1978 USAMO Problems (→Problem 4)
- 20:01, 16 August 2011 (diff | hist) . . (+230) . . 1978 USAMO Problems (→Problem 3)
- 19:59, 16 August 2011 (diff | hist) . . (+302) . . 1978 USAMO Problems (→Problem 2)
- 19:59, 16 August 2011 (diff | hist) . . (+127) . . 1978 USAMO Problems (→Problem 1)
- 15:22, 15 August 2011 (diff | hist) . . (+389) . . 2004 AMC 8 Problems
- 14:55, 15 August 2011 (diff | hist) . . (-1,470) . . 2004 AMC 8 Problems (Blanked the page)
- 14:49, 15 August 2011 (diff | hist) . . (+383) . . N 1994 AJHSME Problems/Problem 25 (Created page with "==Problem== Find the sum of the digits in the answer to <math>\underbrace{9999\cdots 99}_{94\text{ nines}} \times \underbrace{4444\cdots 44}_{94\text{ fours}}</math> where a s...")
- 14:49, 15 August 2011 (diff | hist) . . (+500) . . N 1994 AJHSME Problems/Problem 24 (Created page with "==Problem== A <math>2</math> by <math>2</math> square is divided into four <math>1</math> by <math>1</math> squares. Each of the small squares is to be painted either green or ...")
- 14:48, 15 August 2011 (diff | hist) . . (+370) . . N 1994 AJHSME Problems/Problem 23 (Created page with "==Problem== If <math>X</math>, <math>Y</math> and <math>Z</math> are different digits, then the largest possible <math>3-</math>digit sum for <math>\begin{tabular}{ccc} X & X &...")
- 14:48, 15 August 2011 (diff | hist) . . (+747) . . N 1994 AJHSME Problems/Problem 22 (Created page with "==Problem== The two wheels shown below are spun and the two resulting numbers are added. The probability that the sum is even is <asy> draw(circle((0,0),3)); draw(circle((7,0)...")
- 14:47, 15 August 2011 (diff | hist) . . (+334) . . N 1994 AJHSME Problems/Problem 21 (Created page with "==Problem== A gumball machine contains <math>9</math> red, <math>7</math> white, and <math>8</math> blue gumballs. The least number of gumballs a person must buy to be sure of ...")
- 14:47, 15 August 2011 (diff | hist) . . (+455) . . N 1994 AJHSME Problems/Problem 20 (Created page with "==Problem== Let <math>W,X,Y</math> and <math>Z</math> be four different digits selected from the set <math>\{ 1,2,3,4,5,6,7,8,9\}.</math> If the sum <math>\dfrac{W}{X} + \dfra...")
- 14:46, 15 August 2011 (diff | hist) . . (+941) . . N 1994 AJHSME Problems/Problem 19 (Created page with "==Problem== Around the outside of a <math>4</math> by <math>4</math> square, construct four semicircles (as shown in the figure) with the four sides of the square as their diame...")
- 14:45, 15 August 2011 (diff | hist) . . (+1,815) . . N 1994 AJHSME Problems/Problem 18 (Created page with "==Problem== Mike leaves home and drives slowly east through city traffic. When he reaches the highway he drives east more rapidly until he reaches the shopping mall where he st...")
- 14:44, 15 August 2011 (diff | hist) . . (+569) . . N 1994 AJHSME Problems/Problem 17 (Created page with "==Problem== Pauline Bunyan can shovel snow at the rate of <math>20</math> cubic yards for the first hour, <math>19</math> cubic yards for the second, <math>18</math> for the thi...")
- 14:43, 15 August 2011 (diff | hist) . . (+290) . . N 1994 AJHSME Problems/Problem 16 (Created page with "==Problem== The perimeter of one square is <math>3</math> times the perimeter of another square. The area of the larger square is how many times the area of the smaller square?...")
- 14:42, 15 August 2011 (diff | hist) . . (+1,974) . . N 1994 AJHSME Problems/Problem 15 (Created page with "==Problem== If this path is to continue in the same pattern: <asy> unitsize(24); draw((0,0)--(1,0)--(1,1)--(2,1)--(2,0)--(3,0)--(3,1)--(4,1)--(4,0)--(5,0)--(5,1)--(6,1)); draw(...")
- 14:40, 15 August 2011 (diff | hist) . . (+356) . . N 1994 AJHSME Problems/Problem 14 (Created page with "==Problem== Two children at a time can play pairball. For <math>90</math> minutes, with only two children playing at time, five children take turns so that each one plays the s...")
- 14:40, 15 August 2011 (diff | hist) . . (+269) . . N 1994 AJHSME Problems/Problem 13 (Created page with "==Problem== The number halfway between <math>\dfrac{1}{6}</math> and <math>\dfrac{1}{4}</math> is <math>\text{(A)}\ \dfrac{1}{10} \qquad \text{(B)}\ \dfrac{1}{5} \qquad \text{(...")
- 14:40, 15 August 2011 (diff | hist) . . (+13) . . 1994 AJHSME Problems/Problem 12
- 14:39, 15 August 2011 (diff | hist) . . (+470) . . N 1994 AJHSME Problems/Problem 12 (Created page with "A lucky year is one in which at least one date, when written in the form month/day/year, has the following property: ''The product of the month times the day equals the last two ...")
- 14:39, 15 August 2011 (diff | hist) . . (+488) . . N 1994 AJHSME Problems/Problem 11 (Created page with "==Problem== Last summer <math>100</math> students attended basketball camp. Of those attending, <math>52</math> were boys and <math>48</math> were girls. Also, <math>40</math>...")
- 14:39, 15 August 2011 (diff | hist) . . (+240) . . N 1994 AJHSME Problems/Problem 10 (Created page with "==Problem== For how many positive integer values of <math>N</math> is the expression <math>\dfrac{36}{N+2}</math> an integer? <math>\text{(A)}\ 7 \qquad \text{(B)}\ 8 \qquad \t...")
- 14:38, 15 August 2011 (diff | hist) . . (+517) . . N 1994 AJHSME Problems/Problem 9 (Created page with "==Problem== A shopper buys a <math>100</math> dollar coat on sale for <math>20\% </math> off. An additional <math>5</math> dollars are taken off the sale price by using a disco...")
- 14:37, 15 August 2011 (diff | hist) . . (+214) . . N 1994 AJHSME Problems/Problem 8 (Created page with "==Problem== For how many three-digit whole numbers does the sum of the digits equal <math>25</math>? <math>\text{(A)}\ 2 \qquad \text{(B)}\ 4 \qquad \text{(C)}\ 6 \qquad \text{...")
- 14:35, 15 August 2011 (diff | hist) . . (+164) . . 1994 AJHSME Problems/Problem 7
- 14:34, 15 August 2011 (diff | hist) . . (+550) . . N 1994 AJHSME Problems/Problem 7 (Created page with "If <math>\angle A = 60^\circ </math>, <math>\angle E = 40^\circ </math> and <math>\angle C = 30^\circ </math>, then <math>\angle BDC = </math> <asy> pair A,B,C,D,EE; A = origin;...")
- 19:51, 14 August 2011 (diff | hist) . . (+519) . . 2006 AMC 8 (→Problem 5)
- 19:49, 14 August 2011 (diff | hist) . . (+774) . . 2006 AMC 8 (→Problem 4)
- 19:48, 14 August 2011 (diff | hist) . . (+323) . . 2006 AMC 8 (→Problem 3)
- 19:47, 14 August 2011 (diff | hist) . . (+262) . . 2006 AMC 8 (→Problem 2)
- 16:07, 14 August 2011 (diff | hist) . . (+1) . . 2006 AMC 8 (→Problem 1)
- 16:07, 14 August 2011 (diff | hist) . . (-31) . . 2006 AMC 8 (→Problem 1)
- 16:06, 14 August 2011 (diff | hist) . . (+19) . . 2006 AMC 8 (→Problem 1)
- 16:06, 14 August 2011 (diff | hist) . . (+292) . . 2006 AMC 8 (→Problem 1)
- 16:03, 14 August 2011 (diff | hist) . . (-7,236) . . 2006 AMC 8 (Replaced content with "==Problem 1== ==Problem 2== ==Problem 3== ==Problem 4== ==Problem 5== ==Problem 6== ==Problem 7== ==Problem 8== ==Problem 9== ==Problem 10== ==Problem 11== ==Problem 12== ==P...")
- 15:53, 14 August 2011 (diff | hist) . . (+257) . . N 2003 AMC 12B/Problem 1 (Created page with "==Problem== Which of the following is the same as <cmath> \frac{2-4+6-8+10-12+14}{3-6+9-12+15-18+21}? </cmath> <math> \textbf{(A)}\ -1\qquad\textbf{(B)}\ -\frac{2}3\qquad\text...")
- 15:52, 14 August 2011 (diff | hist) . . (+469) . . N 1970 AHSME (Created page with "==Problem 1== ==Problem 2== ==Problem 3== ==Problem 4== ==Problem 5== ==Problem 6== ==Problem 7== ==Problem 8== ==Problem 9== ==Problem 10== ==Problem 11== ==Problem 1...")
- 14:10, 14 August 2011 (diff | hist) . . (+73) . . N 1978 USAMO Problems (Created page with "==Problem 1== ==Problem 2== ==Problem 3== ==Problem 4== ==Problem 5==")
- 14:09, 14 August 2011 (diff | hist) . . (-95) . . 1984 USAMO Problems/Problem 2 (Blanked the page)
- 14:05, 14 August 2011 (diff | hist) . . (+73) . . N 1986 USAMO (Created page with "==Problem 1== ==Problem 2== ==Problem 3== ==Problem 4== ==Problem 5==")
- 13:29, 14 August 2011 (diff | hist) . . (-1) . . 2009 AMC 8 Problems/Problem 22
- 13:29, 14 August 2011 (diff | hist) . . (+222) . . N 2009 AMC 8 Problems/Problem 22 (Created page with "==Problem== How many whole numbers between 1 and 1000 do [b]not[/b] contain the digit 1? <math> \textbf{(A)}\ 512 \qquad \textbf{(B)}\ 648 \qquad \textbf{(C)}\ 720 \qquad \text...")
- 13:29, 14 August 2011 (diff | hist) . . (+561) . . N 2009 AMC 8 Problems/Problem 21 (Created page with "==Problem== Andy and Bethany have a rectangular array of numbers with <math> 40</math> rows and <math> 75</math> columns. Andy adds the numbers in each row. The average of his <...")
- 13:28, 14 August 2011 (diff | hist) . . (+13) . . 2009 AMC 8 Problems/Problem 20
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