User contributions
(newest | oldest) View (newer 20 | older 20) (20 | 50 | 100 | 250 | 500)
- 19:24, 11 May 2013 (diff | hist) . . (+61) . . 2013 USAJMO Problems/Problem 1
- 19:23, 11 May 2013 (diff | hist) . . (+18) . . 2013 USAJMO Problems/Problem 1
- 18:58, 11 May 2013 (diff | hist) . . (+2) . . 2013 USAMO Problems/Problem 1
- 18:53, 11 May 2013 (diff | hist) . . (+1) . . 2013 USAMO
- 18:52, 11 May 2013 (diff | hist) . . (+246) . . N 2013 USAJMO Problems/Problem 5 (Created page with "Quadrilateral is inscribed in the semicircle with diameter . Segments and meet at . Point is the foot of the perpendicular from to line . Point lies on such that line is perpendi...")
- 18:52, 11 May 2013 (diff | hist) . . (+213) . . N 2013 USAJMO Problems/Problem 4 (Created page with "Let be the number of ways to write as a sum of powers of , where we keep track of the order of the summation. For example, because can be written as , , , , , and . Find the smal...")
- 18:51, 11 May 2013 (diff | hist) . . (0) . . 2013 USAJMO
- 18:51, 11 May 2013 (diff | hist) . . (-2) . . 2013 USAJMO
- 18:50, 11 May 2013 (diff | hist) . . (+525) . . N 2013 USAJMO Problems/Problem 2 (Created page with "Each cell of an board is filled with some nonnegative integer. Two numbers in the filling are said to be adjacent if their cells share a common side. (Note that two numbers in ce...")
- 18:50, 11 May 2013 (diff | hist) . . (+71) . . N 2013 USAJMO Problems/Problem 1 (Created page with "re there integers and such that and are both perfect cubes of integers?")
- 18:50, 11 May 2013 (diff | hist) . . (+6) . . 2013 USAJMO
- 18:49, 11 May 2013 (diff | hist) . . (+201) . . N 2013 USAMO Problems/Problem 6 (Created page with "Let be a triangle. Find all points on segment satisfying the following property: If and are the intersections of line with the common external tangent lines of the circumcircles ...")
- 18:49, 11 May 2013 (diff | hist) . . (+178) . . N 2013 USAMO Problems/Problem 5 (Created page with "Given postive integers and , prove that there is a positive integer such that the numbers and have the same number of occurrences of each non-zero digit when written in base ten.")
- 18:49, 11 May 2013 (diff | hist) . . (+32) . . N 2013 USAMO Problems/Problem 4 (Created page with "Find all real numbers satisfying")
- 18:48, 11 May 2013 (diff | hist) . . (+663) . . N 2013 USAMO Problems/Problem 3 (Created page with "Let be a positive integer. There are marks, each with a black side and a white side, arranged into an equilateral triangle, with the biggest row containing marks. Initially, each...")
- 18:48, 11 May 2013 (diff | hist) . . (+437) . . N 2013 USAMO Problems/Problem 2 (Created page with "For a positive integer plot equally spaced points around a circle. Label one of them , and place a marker at . One may move the marker forward in a clockwise direction to either ...")
- 18:48, 11 May 2013 (diff | hist) . . (+192) . . N 2013 USAMO Problems/Problem 1 (Created page with "In triangle , points lie on sides respectively. Let , , denote the circumcircles of triangles , , , respectively. Given the fact that segment intersects , , again at respectively...")
- 18:37, 11 May 2013 (diff | hist) . . (+1) . . 2013 USAJMO
- 18:37, 11 May 2013 (diff | hist) . . (+1,288) . . 2013 USAJMO
- 18:36, 11 May 2013 (diff | hist) . . (+1) . . 2013 USAMO
(newest | oldest) View (newer 20 | older 20) (20 | 50 | 100 | 250 | 500)