# User contributions

- 22:04, 13 February 2013 (diff | hist) . . (+141) . . 2013 AMC 12A Problems/Problem 21 (Clarification and subscripts)
- 21:58, 13 February 2013 (diff | hist) . . (-296) . . 2013 AMC 12A Problems/Problem 21 (Solution 2 is equivalent to the original solution, and assumes the answer a priori)
- 03:56, 11 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 23: Fixed solution link)
- 19:10, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 19: Fixed solution link)
- 19:10, 7 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems/Problem 19 (moved 2013 AMC 12A Problems/Problems 19 to 2013 AMC 12A Problems/Problem 19: Wrong title ("Problems 19"))
- 19:10, 7 February 2013 (diff | hist) . . (+46) . . N 2013 AMC 12A Problems/Problems 19 (moved 2013 AMC 12A Problems/Problems 19 to 2013 AMC 12A Problems/Problem 19: Wrong title ("Problems 19")) (current)
- 19:06, 7 February 2013 (diff | hist) . . (-1) . . 2013 AMC 12A Problems (→Problem 18: Fixed solution link)
- 19:06, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 12: Fixed solution link)
- 07:25, 7 February 2013 (diff | hist) . . (+164) . . N 2013 AMC 12A Answer Key (Created page with "1. E 2. C 3. E 4. C 5. B 6. B 7. C 8. D 9. C 10. D 11. C 12. A 13. B 14. B 15. D 16. E 17. D 18. B 19. D 20. B 21. A 22. E 23. C 24. E 25. A")
- 05:12, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 25: Fixed solution link)
- 05:07, 7 February 2013 (diff | hist) . . (+370) . . 2013 AMC 12A Problems (→Problem 20: Added Problem 20)
- 04:54, 7 February 2013
(diff | hist) . .
**(+1,230)** . . N 2013 AMC 12A Problems/Problem 22 (Created page with "Working backwards, we can multiply 5-digit palindromes <math>ABCBA</math> by <math>11</math>, giving a 6-digit palindrome: <math>A (A+B) (B+C) (B+C) (A+B) A</math> Note that if...") - 04:10, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 22: Fixed solution link)
- 04:07, 7 February 2013 (diff | hist) . . (-1) . . 2013 AMC 12A Problems (→Problem 16: Fixed solution link)
- 04:06, 7 February 2013 (diff | hist) . . (+5) . . m 2013 AMC 12A Problems/Problem 16 (Clarification)
- 04:03, 7 February 2013
(diff | hist) . .
**(+1,441)** . . N 2013 AMC 12A Problems/Problem 16 (Created page with "Let pile <math>A</math> have <math>A</math> rocks, and so on. The mean weight of <math>A</math> and <math>C</math> together is <math>44</math>, so the total weight of <math>A</m...") - 03:26, 7 February 2013 (diff | hist) . . (+10) . . m 2013 AMC 12A Problems/Problem 9 (Replaced bar with overline in LaTeX)
- 03:25, 7 February 2013 (diff | hist) . . (-10) . . m 2013 AMC 12A Problems/Problem 4 (Wording)
- 03:24, 7 February 2013 (diff | hist) . . (+126) . . 2013 AMC 12A Problems/Problem 3 (LaTeX formatting)
- 03:20, 7 February 2013 (diff | hist) . . (-30) . . 2013 AMC 12A Problems/Problem 2 (LaTeX formatting)
- 03:15, 7 February 2013 (diff | hist) . . (+104) . . 2013 AMC 12A Problems/Problem 1 (LaTeX formatting)
- 01:53, 7 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems/Problem 11 (moved 2013 AMC 12A Problems/Problems 11 to 2013 AMC 12A Problems/Problem 11: Wrong title ("Problems 11"))
- 01:53, 7 February 2013 (diff | hist) . . (+46) . . N 2013 AMC 12A Problems/Problems 11 (moved 2013 AMC 12A Problems/Problems 11 to 2013 AMC 12A Problems/Problem 11: Wrong title ("Problems 11")) (current)
- 01:52, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 11: Fixed solution link)
- 01:49, 7 February 2013 (diff | hist) . . (+60) . . 2013 AMC 12A Problems/Problem 21
- 01:30, 7 February 2013
(diff | hist) . .
**(+1,018)** . . N 2013 AMC 12A Problems/Problem 21 (Created page with "Let <math>f(x) = \log(x + f(x-1))</math> and <math>f(2) = log(2)</math> We can reason out an approximation, by ignoring the <math>f(x-1)</math>: <math>f(x) \approx \log x</math...") - 00:42, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 21: Fixed solution link)
- 00:42, 7 February 2013 (diff | hist) . . (-1) . . 2013 AMC 12A Problems (→Problem 15: Fixed solution link)
- 00:41, 7 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems/Problem 13 (moved 2013 AMC 12A Problems/Problems 13 to 2013 AMC 12A Problems/Problem 13: Wrong title ("Problems 13"))
- 00:41, 7 February 2013 (diff | hist) . . (+46) . . N 2013 AMC 12A Problems/Problems 13 (moved 2013 AMC 12A Problems/Problems 13 to 2013 AMC 12A Problems/Problem 13: Wrong title ("Problems 13")) (current)
- 00:41, 7 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 13: Fixed solution link)
- 00:38, 7 February 2013
(diff | hist) . .
**(+610)** . . N 2013 AMC 12A Problems/Problem 15 (Created page with "There are two possibilities regarding the parents. 1) Both are in the same store. In this case, we can treat them both as a single bunny, and they can go in any of the 4 stores....") - 22:48, 6 February 2013
(diff | hist) . .
**(+924)** . . Nm 2013 AMC 12A Problems/Problem 17 (Created page with "The first pirate takes <math>\frac{1}{12}</math> of the <math>x</math> coins, leaving <math>\frac{11}{12} x</math>. The second pirate takes <math>\frac{2}{12}</math> of the rema...") - 22:28, 6 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 17: Fixed solution link)
- 22:17, 6 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems/Problem 14 (moved 2013 AMC 12A Problems/Problems 14 to 2013 AMC 12A Problems/Problem 14: Incorrect title ("Problems 14"))
- 22:17, 6 February 2013 (diff | hist) . . (+46) . . N 2013 AMC 12A Problems/Problems 14 (moved 2013 AMC 12A Problems/Problems 14 to 2013 AMC 12A Problems/Problem 14: Incorrect title ("Problems 14")) (current)
- 22:17, 6 February 2013 (diff | hist) . . (-1) . . 2013 AMC 12A Problems (→Problem 14: Fixed solution link)
- 22:06, 6 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 9: Fixed solution link)
- 22:05, 6 February 2013 (diff | hist) . . (-1) . . 2013 AMC 12A Problems (→Problem 10: Fixed solution link)
- 22:05, 6 February 2013 (diff | hist) . . (+452) . . N 2013 AMC 12A Problems/Problem 10 (Created page with "Note that <math>\frac{1}{11} = 0.\overline{09}</math>. Dividing by 3 gives <math>\frac{1}{33} = 0.\overline{03}</math>, and dividing by 9 gives <math>\frac{1}{99} = 0.\overline{...")
- 21:56, 6 February 2013 (diff | hist) . . (+478) . . N 2013 AMC 12A Problems/Problem 9 (Created page with "Note that because <math>\bar{DE}</math> and <math>\bar{EF}</math> are parallel to the sides of <math>\triangle ABC</math>, the internal triangles <math>\triangle BDE</math> and <...")
- 21:46, 6 February 2013 (diff | hist) . . (+227) . . N 2013 AMC 12A Problems/Problem 7 (Created page with "<math>S_9 = 110</math>, <math>S_7 = 42</math> <math>S_8 = S_9 - S_ 7 = 110 - 42 = 68</math> <math>S_6 = S_8 - S_7 = 68 - 42 = 26</math> <math>S_5 = S_7 - S_6 = 42 - 26 = 16</m...")
- 21:42, 6 February 2013
(diff | hist) . .
**(+532)** . . N 2013 AMC 12A Problems/Problem 6 (Created page with "Let the number of 3-point shots attempted be <math>x</math>. Since she attempted 30 shots, the number of 2-point shots attempted must be <math>30 - x</math>. Since she was succe...") - 21:33, 6 February 2013 (diff | hist) . . (+370) . . N 2013 AMC 12A Problems/Problem 5 (Created page with "Add up the amounts that Tom, Dorothy, and Sammy paid to get $<math>405</math>, and divide by 3 to get $<math>135</math>, the amount that each should have paid. Tom, ha...")
- 21:26, 6 February 2013 (diff | hist) . . (+235) . . N 2013 AMC 12A Problems/Problem 8 (Created page with "<math> x+\tfrac{2}{x}= y+\tfrac{2}{y} </math> Since <math>x\not=y</math>, we may assume that <math>x=\frac{2}{y}</math> and/or, equivalently, <math>y=\frac{2}{x}</math>. Cross ...")
- 21:22, 6 February 2013 (diff | hist) . . (-1) . . m 2013 AMC 12A Problems (→Problem 8: Fixed solution link)
- 21:21, 6 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems (→Problem 8: Fixed solution link)
- 21:21, 6 February 2013 (diff | hist) . . (0) . . m 2013 AMC 12A Problems (→Problem 7: Fixed solution link)
- 21:17, 6 February 2013 (diff | hist) . . (+96) . . 2013 AMC 12A Problems/Problem 4 (LaTeX formatting)