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- 17:56, 7 January 2009 (diff | hist) . . (+162) . . N 2000 AMC 10 Problems/Problem 15 (New page: <math>ab=a-b</math> <math>\frac{a}{b}+\frac{b}{a}-ab=\frac{a^2+b^2}{ab}-ab=\frac{-a^2b^2+a^2+b^2}{ab}</math> <math>\frac{-a^2+2ab-b^2+a^2+b^2}{ab}=2</math>. E.)
- 17:54, 7 January 2009 (diff | hist) . . (+616) . . N 2000 AMC 10 Problems/Problem 14 (New page: 71, 76, 80, 82, 91. The sum of the first 2 must be even, so we must choose 2 evens or the 2 odds. Let us look at the numbers (mod 3). 2,1,2,1,1. If we choose the two odds, the next num...)
- 17:49, 7 January 2009 (diff | hist) . . (+256) . . N 2000 AMC 10 Problems/Problem 13 (New page: The question is rather ambiguous, however I will assume that the pegs of the same color are distinguishable. Clearly, there is only 1 possible ordering if the colors are indistinguishable...)
- 17:47, 7 January 2009 (diff | hist) . . (+269) . . N 2000 AMC 10 Problems/Problem 12 (New page: We have a recursion: <math>A_n=A_{n-1}+4(n-1)</math>. I.E. we add increasing multiples of <math>4</math> each time we go up a figure. So, to go from Figure 0 to 100, we add <math>4 \cd...)
- 15:06, 7 January 2009 (diff | hist) . . (+426) . . N 2000 AMC 10 Problems/Problem 11 (New page: Two prime numbers between <math>4</math> and <math>18</math> are both odd. odd*odd=odd. odd-odd-odd=odd. Thus, we can discard the even choices. <math>ab-a-b=(a-1)(b-1)-1</math>. <mat...)
- 15:03, 7 January 2009 (diff | hist) . . (+197) . . N 2000 AMC 10 Problems/Problem 10 (New page: The largest possible value for <math>x</math> is <math>9</math>. The smallest is <math>3</math>. <math>9-3=6</math>. <math>8</math> is the smallest that cannot be made (of the choices li...)
- 15:03, 7 January 2009 (diff | hist) . . (+4) . . 2000 AMC 10 Problems/Problem 9
- 15:02, 7 January 2009 (diff | hist) . . (+105) . . N 2000 AMC 10 Problems/Problem 9 (New page: <math>|x-2|=p</math> <math>x<2</math>, so <math>2-x=p</math>. <math>x+p=2</math>. <math>x-p=2-2p</math>.)
- 15:02, 7 January 2009 (diff | hist) . . (+3) . . 2000 AMC 10 Problems/Problem 8
- 15:01, 7 January 2009 (diff | hist) . . (+188) . . N 2000 AMC 10 Problems/Problem 8 (New page: Let <math>f</math> be the number of freshman and s be the number of sophomores. <math>\frac{2}{5}f=\frac{4}{5}s</math>. <math>f=2s</math>. There are twice as many freshman as sophomores.)
- 15:00, 7 January 2009 (diff | hist) . . (+4) . . 2000 AMC 10 Problems/Problem 7
- 15:00, 7 January 2009 (diff | hist) . . (+576) . . N 2000 AMC 10 Problems/Problem 7 (New page: <asy> draw((0,2)--(3.4,2)--(3.4,0)--(0,0)--cycle); draw((0,0)--(1.3,2)); draw((0,0)--(3.4,2)); dot((0,0)); dot((0,2)); dot((3.4,2)); dot((3.4,0)); dot((1.3,2)); label("$A$",(0,2),NW); labe...)
- 14:57, 7 January 2009 (diff | hist) . . (0) . . 2000 AMC 10 Problems/Problem 6
- 14:57, 7 January 2009 (diff | hist) . . (+158) . . N 2000 AMC 10 Problems/Problem 6 (New page: The pattern of the units digits are 1,1,2,3,5,8,3,1,4,5,9,4,3,7,0,7,7,4,1,5,6 In order of appearance: <math>1,2,3,5,8,4,9,7,0,6</math>. 6 is the last. D.)
- 14:55, 7 January 2009 (diff | hist) . . (+414) . . N 2000 AMC 10 Problems/Problem 5 (New page: (a) Clearly does not change, as <math>MN=\frac{1}{2}AB</math>. Since <math>AB</math> does not change, neither does <math>MN</math>. (b) Obviously, the perimetar changes. (c) The area cle...)
- 14:53, 7 January 2009 (diff | hist) . . (+214) . . N 2000 AMC 10 Problems/Problem 4 (New page: Let <math>x</math> be the fixed fee, and <math>y</math> be the amount she pays for the minutes she used in the first month. <math>x+y=12.48</math> <math>x+2y=17.54</math>. <math>y=5.06</...)
- 14:52, 7 January 2009 (diff | hist) . . (+124) . . N 2000 AMC 10 Problems/Problem 3 (New page: <math>x \cdot .8 \cdot .8=32</math> <math>x \cdot .64=32</math> <math>x \cdot \frac{32}{50}=32</math> <math>x=50</math>. B.)
- 14:51, 7 January 2009 (diff | hist) . . (0) . . 2000 AMC 10 Problems/Problem 2
- 14:51, 7 January 2009 (diff | hist) . . (+91) . . N 2000 AMC 10 Problems/Problem 2 (New page: <math>2000 \cdot 2000^{2000}=2000^1 \cdot 2000^{2000}=2000^{2000+1}=2000^{2001}</math>. B.)
- 14:50, 7 January 2009 (diff | hist) . . (+103) . . N 2000 AMC 10 Problems/Problem 1 (New page: 2001=1*3*667=3*23*29 1+3+667=671 3+23+29=55 1+29+69=99 1+23+87=111 Clearly, 671, or E is the largest.)
- 17:45, 10 August 2008 (diff | hist) . . (+413) . . 2008 AMC 10B Problems/Problem 15
- 17:42, 10 August 2008 (diff | hist) . . (+131) . . 2008 AMC 10B Problems/Problem 10 (→Problem)
- 17:41, 10 August 2008 (diff | hist) . . (-86) . . 2008 AMC 10B Problems/Problem 10 (→Solution)
- 17:38, 10 August 2008 (diff | hist) . . (-85) . . 2008 AMC 10B Problems/Problem 10 (→Problem)
- 17:37, 10 August 2008 (diff | hist) . . (+833) . . 2008 AMC 10B Problems/Problem 12
- 17:35, 10 August 2008 (diff | hist) . . (-522) . . 2008 AMC 10B Problems/Problem 11 (→Problem)
- 17:34, 10 August 2008 (diff | hist) . . (+134) . . 2008 AMC 10B Problems/Problem 11 (→Solution)
- 17:34, 10 August 2008 (diff | hist) . . (+244) . . 2008 AMC 10B Problems/Problem 11 (→Problem)
- 17:33, 10 August 2008 (diff | hist) . . (+832) . . 2008 AMC 10B Problems/Problem 11
- 17:26, 10 August 2008 (diff | hist) . . (+620) . . 2008 AMC 10B Problems/Problem 10
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