(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)

• 19:11, 20 November 2009 (diff | hist) . . (-448)‎ . . User:Xpmath ‎ (Undo revision 32960 by Thunder365 (Talk)) (current)
• 11:15, 16 July 2009 (diff | hist) . . (-86)‎ . . User:Xpmath ‎ (→‎Goals for 9th grade)
• 10:45, 16 July 2009 (diff | hist) . . (+397)‎ . . N 1965 IMO Problems/Problem 6 ‎ (Created page with '== Problem == In a plane a set of <math>n</math> points (<math>n\geq 3</math>) is given. Each pair of points is connected by a segment. Let <math>d</math> be the length of the lo…')
• 10:44, 16 July 2009 (diff | hist) . . (+537)‎ . . N 1965 IMO Problems/Problem 5 ‎ (Created page with '== Problem == Consider <math>\triangle OAB</math> with acute angle <math>AOB</math>. Through a point <math>M \neq O</math> perpendiculars are drawn to <math>OA</math> and <math>O…')
• 10:44, 16 July 2009 (diff | hist) . . (+240)‎ . . N 1965 IMO Problems/Problem 4 ‎ (Created page with '== Problem == Find all sets of four real numbers <math>x_1</math>, <math>x_2</math>, <math>x_3</math>, <math>x_4</math> such that the sum of any one and the product of the other …')
• 10:43, 16 July 2009 (diff | hist) . . (+668)‎ . . N 1965 IMO Problems/Problem 3 ‎ (Created page with '== Problem == Given the tetrahedron <math>ABCD</math> whose edges <math>AB</math> and <math>CD</math> have lengths <math>a</math> and <math>b</math> respectively. The distance be…')
• 10:43, 16 July 2009 (diff | hist) . . (+635)‎ . . N 1965 IMO Problems/Problem 2 ‎ (Created page with '== Problem == Consider the system of equations <cmath>a_{11}x_1 + a_{12}x_2 + a_{13}x_3 = 0</cmath> <cmath>a_{21}x_1 + a_{22}x_2 + a_{23}x_3 = 0</cmath> <cmath>a_{31}x_1 + a_{32}…')
• 10:42, 16 July 2009 (diff | hist) . . (-1)‎ . . 1965 IMO Problems/Problem 1 ‎
• 10:41, 16 July 2009 (diff | hist) . . (+250)‎ . . N 1965 IMO Problems/Problem 1 ‎ (Created page with '== Problem == Determine all values <math>x</math> in the interval <math>0\leq x\leq 2\pi </math> which satisfy the inequality <cmath>2\cos x \leq \left| \sqrt{1+\sin 2x} - \sqrt{…')
• 10:40, 16 July 2009 (diff | hist) . . (+1)‎ . . 1964 IMO Problems/Problem 6 ‎ (→‎Problem)
• 10:39, 16 July 2009 (diff | hist) . . (+13)‎ . . 1964 IMO Problems/Problem 6 ‎ (→‎Solution)
• 10:39, 16 July 2009 (diff | hist) . . (+13)‎ . . 1964 IMO Problems/Problem 5 ‎ (→‎Solution)
• 10:38, 16 July 2009 (diff | hist) . . (+13)‎ . . 1964 IMO Problems/Problem 4 ‎ (→‎Solution)
• 10:38, 16 July 2009 (diff | hist) . . (+13)‎ . . 1964 IMO Problems/Problem 3 ‎ (→‎Solution)
• 10:37, 16 July 2009 (diff | hist) . . (+13)‎ . . 1964 IMO Problems/Problem 2 ‎ (→‎Solution)
• 18:36, 15 July 2009 (diff | hist) . . (+597)‎ . . N 1964 IMO Problems/Problem 6 ‎ (Created page with '== Problem == In tetrahedron <math>ABCD</math>, vertex <math>D</math> is connected with <math>D_0</math>, the centrod of <math>\triangle ABC</math>. Lines parallel to <math>DD_0<…')
• 18:35, 15 July 2009 (diff | hist) . . (+338)‎ . . N 1964 IMO Problems/Problem 5 ‎ (Created page with '== Problem == Suppose five points in a plane are situated so that no two of the straight lines joining them are parallel, perpendicular, or coincident. From each point perpendicu…')
• 18:34, 15 July 2009 (diff | hist) . . (+326)‎ . . N 1964 IMO Problems/Problem 4 ‎ (Created page with '== Problem == Seventeen people correspond by mail with one another - each one with all the rest. In their letters only three different topics are discussed. Each pair of correspo…')
• 18:34, 15 July 2009 (diff | hist) . . (+407)‎ . . N 1964 IMO Problems/Problem 3 ‎ (Created page with '== Problem == A circle is inscribed in a triangle <math>ABC</math> with sides <math>a,b,c</math>. Tangents to the circle parallel to the sides of the triangle are contructed. Eac…')
• 18:33, 15 July 2009 (diff | hist) . . (+158)‎ . . N 1964 IMO Problems/Problem 2 ‎ (Created page with '== Problem == Suppose <math>a, b, c</math> are the sides of a triangle. Prove that <cmath>a^2(b+c-a)+b^2(c+a-b)+c^2(a+b-c)\le{3abc}.</cmath> == Solution ==')
• 18:31, 15 July 2009 (diff | hist) . . (+6)‎ . . 1964 IMO Problems ‎ (Undo revision 32320 by Xpmath (Talk))
• 18:31, 15 July 2009 (diff | hist) . . (+6)‎ . . 1964 IMO Problems ‎ (Undo revision 32321 by Xpmath (Talk))
• 18:30, 15 July 2009 (diff | hist) . . (-6)‎ . . 1964 IMO Problems ‎ (→‎Day II)
• 18:29, 15 July 2009 (diff | hist) . . (-6)‎ . . 1964 IMO Problems ‎ (→‎Day I)
• 18:29, 15 July 2009 (diff | hist) . . (+476)‎ . . 1964 IMO Problems/Problem 1 ‎ (→‎Solution)
• 18:16, 15 July 2009 (diff | hist) . . (+257)‎ . . N 1964 IMO Problems/Problem 1 ‎ (Created page with '== Problem == (a) Find all positive integers <math>n</math> for which <math>2^n-1</math> is divisible by <math>7</math>. (b) Prove that there is no positive integer <math>n</mat…')
• 18:13, 15 July 2009 (diff | hist) . . (+2,507)‎ . . N 1964 IMO Problems ‎ (Created page with 'Problems of the 6th IMO 1964 in USSR. == Day I == === Problem 1 === (a) Find all positive integers <math>n</math> for which <math>2^n-1</math> is divisible by <math>7</math…')
• 08:52, 5 July 2009 (diff | hist) . . (-4)‎ . . User:Xpmath ‎ (→‎Stuff to do during summer)
• 08:51, 5 July 2009 (diff | hist) . . (+22)‎ . . User:5849206328x ‎
• 11:15, 7 June 2009 (diff | hist) . . (-219)‎ . . User:Xpmath ‎ (→‎To Do List)
• 11:14, 7 June 2009 (diff | hist) . . (-100)‎ . . User:Xpmath ‎ (→‎Minor Goals for 8th grade)
• 11:13, 7 June 2009 (diff | hist) . . (-370)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 11:12, 7 June 2009 (diff | hist) . . (-139)‎ . . User:Xpmath ‎ (→‎Eighth Grade)
• 11:11, 7 June 2009 (diff | hist) . . (+72)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 12:40, 9 April 2009 (diff | hist) . . (+140)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 20:19, 4 April 2009 (diff | hist) . . (+5)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 20:19, 4 April 2009 (diff | hist) . . (+28)‎ . . User:Xpmath ‎ (→‎Minor Goals for 8th grade)
• 20:18, 4 April 2009 (diff | hist) . . (+10)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 11:48, 15 March 2009 (diff | hist) . . (+62)‎ . . User:Xpmath ‎ (→‎Eighth Grade)
• 15:32, 27 February 2009 (diff | hist) . . (+14)‎ . . User:Xpmath ‎ (→‎Minor Goals for 8th grade)
• 15:32, 27 February 2009 (diff | hist) . . (+25)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 16:43, 20 February 2009 (diff | hist) . . (-1)‎ . . User:Xpmath ‎ (→‎Minor Goals for 8th grade)
• 16:06, 11 February 2009 (diff | hist) . . (+4)‎ . . User:Xpmath ‎ (→‎Major Goals for 8th Grade)
• 17:42, 24 January 2009 (diff | hist) . . (-3)‎ . . 2003 AMC 10A Problems/Problem 3 ‎ (→‎Solution)
• 18:53, 16 January 2009 (diff | hist) . . (+8)‎ . . User:Xpmath ‎ (→‎The Problem Solver's Resource To Do List)
• 11:44, 11 January 2009 (diff | hist) . . (+294)‎ . . User:Temperal/The Problem Solver's Resource6 ‎ (current)
• 11:40, 11 January 2009 (diff | hist) . . (+33)‎ . . User:Xpmath ‎ (→‎The Problem Solver's Resource To Do List)
• 10:47, 11 January 2009 (diff | hist) . . (+205)‎ . . User:Temperal/The Problem Solver's Resource6 ‎ (→‎Properties)
• 10:46, 11 January 2009 (diff | hist) . . (+67)‎ . . User:Xpmath ‎ (→‎Minor Goals for 8th grade)
• 10:45, 11 January 2009 (diff | hist) . . (+64)‎ . . User:Xpmath ‎ (→‎Eighth Grade)

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)