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- 20:26, 6 March 2009 (diff | hist) . . (+2,102) . . 2009 AMC 10B Problems/Problem 13
- 18:16, 3 March 2009 (diff | hist) . . (+13) . . m 2009 AMC 10B Problems (→Problem 18)
- 17:30, 3 March 2009 (diff | hist) . . (+781) . . N 2009 AMC 10B Problems/Problem 11 (New page: == Problem == How many <math>7</math>-digit palindromes (numbers that read the same backward as forward) can be formed using the digits <math>2</math>, <math>2</math>, <math>3</math>, <ma...)
- 17:23, 3 March 2009 (diff | hist) . . (+868) . . N 2009 AMC 10B Problems/Problem 10 (New page: == Problem == A flagpole is originally <math>5</math> meters tall. A hurricane snaps the flagpole at a point <math>x</math> meters above the ground so that the upper part, still attached ...)
- 17:06, 3 March 2009 (diff | hist) . . (+1,413) . . N 2009 AMC 10B Problems/Problem 9 (New page: == Problem == Segment <math>BD</math> and <math>AE</math> intersect at <math>C</math>, as shown, <math>AB=BC=CD=CE</math>, and <math>\angle A = \frac 52 \angle B</math>. What is the degre...)
- 14:39, 3 March 2009 (diff | hist) . . (+734) . . N 2009 AMC 10B Problems/Problem 2 (New page: == Problem == Which of the following is equal to <math>\dfrac{\frac{1}{3}-\frac{1}{4}}{\frac{1}{2}-\frac{1}{3}}</math>? <math> \text{(A) } \frac 14 \qquad \text{(B) } \frac 13 \qquad \te...)
- 09:11, 3 March 2009 (diff | hist) . . (+14,588) . . N 2009 AMC 10B Problems (New page: == Problem 1 == Each morning of her five-day workweek, Jane bought either a 50-cent muffin or a 75-cent bagel. Her total cost for the week was a whole number of dollars, How many bagels...)
- 22:05, 2 March 2009 (diff | hist) . . (+2,953) . . N 2009 AMC 12B Problems/Problem 24 (New page: == Problem == For how many values of <math>x</math> in <math>[0,\pi]</math> is <math>\sin^{ - 1}(\sin 6x) = \cos^{ - 1}(\cos x)</math>? Note: The functions <math>\sin^{ - 1} = \arcsin</mat...)
- 20:51, 2 March 2009 (diff | hist) . . (+496) . . 2009 AMC 12B Problems/Problem 19
- 20:40, 2 March 2009 (diff | hist) . . (+972) . . 2009 AMC 10B Problems/Problem 15
- 17:03, 2 March 2009 (diff | hist) . . (+599) . . 2009 AMC 12B Problems/Problem 9 (→Solution 2)
- 10:27, 2 March 2009 (diff | hist) . . (+5,785) . . N 2009 AMC 12B Problems/Problem 25 (New page: == Problem == The set <math>G</math> is defined by the points <math>(x,y)</math> with integer coordinates, <math>3\le|x|\le7</math>, <math>3\le|y|\le7</math>. How many squares of side at l...)
- 19:24, 1 March 2009 (diff | hist) . . (-25) . . m 2009 AMC 12B Problems/Problem 19
- 19:23, 1 March 2009 (diff | hist) . . (+3,004) . . N 2009 AMC 12B Problems/Problem 19 (New page: == Problem == For each positive integer <math>n</math>, let <math>f(n) = n^4 - 360n^2 + 400</math>. What is the sum of all values of <math>f(n)</math> that are prime numbers? <math>\textb...)
- 18:28, 1 March 2009 (diff | hist) . . (+1,629) . . N 2009 AMC 12B Problems/Problem 15 (New page: == Problem == Assume <math>0 < r < 3</math>. Below are five equations for <math>x</math>. Which equation has the largest solution <math>x</math>? <math>\textbf{(A)}\ 3(1 + r)^x = 7\qqua...)
- 18:09, 1 March 2009 (diff | hist) . . (+1,528) . . N 2009 AMC 12B Problems/Problem 14 (New page: == Problem == Five unit squares are arranged in the coordinate plane as shown, with the lower left corner at the origin. The slanted line, extending from <math>(a,0)</math> to <math>(3,3)<...)
- 15:00, 1 March 2009 (diff | hist) . . (+2,227) . . 2007 AMC 10A Problems/Problem 18
- 15:38, 27 February 2009 (diff | hist) . . (+2,900) . . N 2009 AMC 12B Problems/Problem 23 (New page: == Problem == A region <math>S</math> in the complex plane is defined by <cmath> S = \{x + iy: - 1\le x\le1, - 1\le y\le1\}. </cmath> A complex number <math>z = x + iy</math> is chosen uni...)
- 10:10, 27 February 2009 (diff | hist) . . (+2,577) . . N 2009 AMC 12B Problems/Problem 22 (New page: == Problem == Parallelogram <math>ABCD</math> has area <math>1,\!000,\!000</math>. Vertex <math>A</math> is at <math>(0,0)</math> and all other vertices are in the first quadrant. Vertices...)
- 09:43, 27 February 2009 (diff | hist) . . (0) . . m 2009 AMC 12B Problems/Problem 21
- 09:42, 27 February 2009 (diff | hist) . . (+1,713) . . N 2009 AMC 12B Problems/Problem 21 (New page: == Problem == Ten women sit in <math>10</math> seats in a line. All of the <math>10</math> get up and then reseat themselves using all <math>10</math> seats, each sitting in the seat she w...)
- 12:57, 25 February 2009 (diff | hist) . . (+213) . . 2009 AMC 10A Problems/Problem 21 (fixed a bug in the solution)
- 11:12, 20 February 2009 (diff | hist) . . (+3,560) . . N 2002 AMC 12A Problems/Problem 18 (New page: == Problem == Let <math>C_1</math> and <math>C_2</math> be circles defined by <math>(x-10)^2 + y^2 = 36</math> and <math>(x+15)^2 + y^2 = 81</math> respectively. What is the length of the ...)
- 08:30, 20 February 2009 (diff | hist) . . (+1,676) . . N 2002 AMC 12A Problems/Problem 21 (New page: == Problem == Consider the sequence of numbers: <math>4,7,1,8,9,7,6,\dots</math> For <math>n>2</math>, the <math>n</math>-th term of the sequence is the units digit of the sum of the two ...)
- 08:16, 20 February 2009 (diff | hist) . . (+2,085) . . N 2002 AMC 12A Problems/Problem 19 (New page: == Problem == The graph of the function <math>f</math> is shown below. How many solutions does the equation <math>f(f(x))=6</math> have? <asy> size(300,300); defaultpen(fontsize(10pt)+l...)
- 08:05, 20 February 2009 (diff | hist) . . (+1,226) . . N 2002 AMC 12A Problems/Problem 20 (New page: == Problem == Suppose that <math>a</math> and <math>b</math> are digits, not both nine and not both zero, and the repeating decimal <math>0.\overline{ab}</math> is expressed as a fraction...)
- 18:51, 18 February 2009 (diff | hist) . . (+782) . . N 2002 AMC 12A Problems/Problem 17 (New page: == Problem == Several sets of prime numbers, such as <math>\{7,83,421,659\}</math> use each of the nine nonzero digits exactly once. What is the smallest possible sum such a set of primes...)
- 18:46, 18 February 2009 (diff | hist) . . (+1,131) . . N 2002 AMC 12A Problems/Problem 24 (New page: == Problem == Find the number of ordered pairs of real numbers <math>(a,b)</math> such that <math>(a+bi)^{2002} = a-bi</math>. <math> \text{(A) }1001 \qquad \text{(B) }1002 \qquad \text{...)
- 18:41, 18 February 2009 (diff | hist) . . (+1,853) . . 2002 AMC 12A Problems
- 18:33, 18 February 2009 (diff | hist) . . (+1,846) . . N 2002 AMC 12A Problems/Problem 16 (New page: {{duplicate|2002 AMC 12A #16 and 2002 AMC 10A #24}} ==Problem== Tina randomly selects two distinct numbers from the set {1, 2, 3, 4, 5...)
- 18:32, 18 February 2009 (diff | hist) . . (-1,616) . . 2002 AMC 10A Problems/Problem 24 (Redirecting to 2002 AMC 12A Problems/Problem 16) (current)
- 18:32, 18 February 2009 (diff | hist) . . (+268) . . 2002 AMC 12A Problems (→Problem 16)
- 18:30, 18 February 2009 (diff | hist) . . (+622) . . N 2002 AMC 12A Problems/Problem 14 (New page: == Problem == For all positive integers <math>n</math>, let <math>f(n)=\log_{2002} n^2</math>. Let <math>N=f(11)+f(13)+f(14)</math>. Which of the following relations is true? <math> \tex...)
- 18:28, 18 February 2009 (diff | hist) . . (+1,049) . . N 2002 AMC 12A Problems/Problem 13 (New page: == Problem == Two different positive numbers <math>a</math> and <math>b</math> each differ from their reciprocals by <math>1</math>. What is <math>a+b</math>? <math> \text{(A) }1 \qquad ...)
- 18:15, 18 February 2009 (diff | hist) . . (+2,026) . . N 2002 AMC 12A Problems/Problem 15 (New page: {{duplicate|2002 AMC 12A #15 and 2002 AMC 10A #21}} == Problem == The mean, median, unique mode, and range of a collection of eight in...)
- 18:15, 18 February 2009 (diff | hist) . . (-1,823) . . 2002 AMC 10A Problems/Problem 21 (Redirecting to 2002 AMC 12A Problems/Problem 15) (current)
- 18:13, 18 February 2009 (diff | hist) . . (+514) . . 2002 AMC 12A Problems
- 16:09, 18 February 2009 (diff | hist) . . (-925) . . 2002 AMC 10A Problems/Problem 14 (Redirecting to 2002 AMC 12A Problems/Problem 12) (current)
- 16:09, 18 February 2009 (diff | hist) . . (+1,283) . . N 2002 AMC 12A Problems/Problem 12 (New page: {{duplicate|2002 AMC 12A #12 and 2002 AMC 10A #14}} == Problem == Both roots of the quadratic equation <math>x^2 - 63x + k = 0</math>...)
- 16:06, 18 February 2009 (diff | hist) . . (+2,416) . . N 2002 AMC 12A Problems/Problem 11 (New page: {{duplicate|2002 AMC 12A #11 and 2002 AMC 10A #12}} == Problem == Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he d...)
- 15:55, 18 February 2009 (diff | hist) . . (-1,363) . . 2002 AMC 10A Problems/Problem 12 (Redirecting to 2002 AMC 12A Problems/Problem 11) (current)
- 15:52, 18 February 2009 (diff | hist) . . (+1,343) . . N 2002 AMC 12A Problems/Problem 9 (included proof of optimality)
- 15:37, 18 February 2009 (diff | hist) . . (-860) . . 2002 AMC 10A Problems/Problem 11 (Redirecting to 2002 AMC 12A Problems/Problem 9) (current)
- 15:35, 18 February 2009 (diff | hist) . . (-1,188) . . 2002 AMC 10A Problems/Problem 8 (Redirecting to 2002 AMC 12A Problems/Problem 8) (current)
- 15:35, 18 February 2009 (diff | hist) . . (+1,382) . . N 2002 AMC 12A Problems/Problem 8 (New page: {{duplicate|2002 AMC 12A #8 and 2002 AMC 10A #8}} ==Problem== Betsy designed a flag using blue triangles, small white squares, and a r...)
- 15:34, 18 February 2009 (diff | hist) . . (-1,165) . . 2002 AMC 10A Problems/Problem 7 (Redirecting to 2002 AMC 12A Problems/Problem 7) (current)
- 15:34, 18 February 2009 (diff | hist) . . (+1,359) . . N 2002 AMC 12A Problems/Problem 7 (New page: {{duplicate|2002 AMC 12A #7 and 2002 AMC 10A #7}} ==Problem== A <math>45^\circ</math> arc of circle A is equal in length to a <math>3...)
- 15:33, 18 February 2009 (diff | hist) . . (0) . . m 2002 AMC 12A Problems/Problem 10
- 15:32, 18 February 2009 (diff | hist) . . (0) . . m 2002 AMC 12A Problems/Problem 6
- 15:32, 18 February 2009 (diff | hist) . . (0) . . m 2002 AMC 12A Problems/Problem 3
- 15:32, 18 February 2009 (diff | hist) . . (0) . . m 2002 AMC 12A Problems/Problem 2
- 15:32, 18 February 2009 (diff | hist) . . (0) . . m 2002 AMC 12A Problems/Problem 1
- 15:30, 18 February 2009 (diff | hist) . . (-1,079) . . 2002 AMC 10A Problems/Problem 5 (Redirecting to 2002 AMC 12A Problems/Problem 5) (current)
- 15:30, 18 February 2009 (diff | hist) . . (+1,273) . . N 2002 AMC 12A Problems/Problem 5 (New page: {{duplicate|2002 AMC 12A #5 and 2002 AMC 10A #5}} ==Problem== Each of the small circles in the figure has radius one. The innermost ci...)
- 15:29, 18 February 2009 (diff | hist) . . (+4,291) . . 2002 AMC 12A Problems
- 15:28, 18 February 2009 (diff | hist) . . (+31) . . m 2002 AMC 10A Problems (→Problem 14)
- 15:26, 18 February 2009 (diff | hist) . . (+8) . . m 2002 AMC 10A Problems (→Problem 12)
- 08:04, 18 February 2009 (diff | hist) . . (+654) . . 2002 AMC 12A Problems/Problem 10
- 07:59, 18 February 2009 (diff | hist) . . (-941) . . 2002 AMC 10A Problems/Problem 17 (Redirecting to 2002 AMC 12A Problems/Problem 10) (current)
- 07:57, 18 February 2009 (diff | hist) . . (+7) . . m 2002 AMC 10A Problems (→Problem 4)
- 07:56, 18 February 2009 (diff | hist) . . (+281) . . 2002 AMC 12A Problems/Problem 6
- 07:56, 18 February 2009 (diff | hist) . . (-473) . . 2002 AMC 10A Problems/Problem 4 (Redirecting to 2002 AMC 12A Problems/Problem 6) (current)
- 07:48, 18 February 2009 (diff | hist) . . (-814) . . 2002 AMC 10A Problems/Problem 10 (Redirecting to 2002 AMC 12A Problems/Problem 1) (current)
- 07:48, 18 February 2009 (diff | hist) . . (+452) . . 2002 AMC 12A Problems/Problem 1
- 07:46, 18 February 2009 (diff | hist) . . (-620) . . 2002 AMC 10A Problems/Problem 6 (Redirecting to 2002 AMC 12A Problems/Problem 2) (current)
- 07:45, 18 February 2009 (diff | hist) . . (+240) . . 2002 AMC 12A Problems/Problem 2
- 07:44, 18 February 2009 (diff | hist) . . (+919) . . 2002 AMC 12A Problems/Problem 3
- 07:43, 18 February 2009 (diff | hist) . . (-1,552) . . 2002 AMC 10A Problems/Problem 3 (Redirecting to 2002 AMC 12A Problems/Problem 3) (current)
- 23:10, 16 February 2009 (diff | hist) . . (+1,105) . . 1985 AIME Problems/Problem 10
- 16:23, 16 February 2009 (diff | hist) . . (+2,335) . . N 2001 AMC 12 Problems/Problem 24 (New page: == Problem == In <math>\triangle ABC</math>, <math>\angle ABC=45^\circ</math>. Point <math>D</math> is on <math>\overline{BC}</math> so that <math>2\cdot BD=CD</math> and <math>\angle DAB...)
- 15:17, 16 February 2009 (diff | hist) . . (+1,683) . . N 2001 AMC 12 Problems/Problem 17 (New page: == Problem == A point <math>P</math> is selected at random from the interior of the pentagon with vertices <math>A = (0,2)</math>, <math>B = (4,0)</math>, <math>C = (2 \pi + 1, 0)</math>,...)
- 15:00, 16 February 2009 (diff | hist) . . (+1,167) . . N 2001 AMC 12 Problems/Problem 20 (New page: == Problem == Points <math>A = (3,9)</math>, <math>B = (1,1)</math>, <math>C = (5,3)</math>, and <math>D=(a,b)</math> lie in the first quadrant and are the vertices of quadrilateral <math...)
- 14:29, 16 February 2009 (diff | hist) . . (+3,121) . . N 2001 AMC 12 Problems/Problem 22 (New page: == Problem == In rectangle <math>ABCD</math>, points <math>F</math> and <math>G</math> lie on <math>AB</math> so that <math>AF=FG=GB</math> and <math>E</math> is the midpoint of <math>\ov...)
- 13:05, 16 February 2009 (diff | hist) . . (+3,034) . . N 2001 AMC 12 Problems/Problem 18 (New page: == Problem == A circle centered at <math>A</math> with a radius of 1 and a circle centered at <math>B</math> with a radius of 4 are externally tangent. A third circle is tangent to the fi...)
- 12:41, 16 February 2009 (diff | hist) . . (+340) . . 2001 AMC 12 Problems (→Problem 18)
- 04:02, 16 February 2009 (diff | hist) . . (+1,277) . . N 2001 AMC 12 Problems/Problem 15 (New page: == Problem == An insect lives on the surface of a regular tetrahedron with edges of length 1. It wishes to travel on the surface of the tetrahedron from the midpoint of one edge to the mid...)
- 03:50, 16 February 2009 (diff | hist) . . (+1,010) . . N 2001 AMC 12 Problems/Problem 14 (New page: == Problem == Given the nine-sided regular polygon <math>A_1 A_2 A_3 A_4 A_5 A_6 A_7 A_8 A_9</math>, how many distinct equilateral triangles in the plane of the polygon have at least two ...)
- 20:11, 15 February 2009 (diff | hist) . . (+1,851) . . N 2001 AMC 12 Problems/Problem 12 (New page: == Problem == How many positive integers not exceeding <math>2001</math> are multiple of <math>3</math> or <math>4</math> but not <math>5</math>? <math> \text{(A) }768 \qquad \text{(B) }...)
- 19:58, 15 February 2009 (diff | hist) . . (+1,068) . . N 2001 AMC 12 Problems/Problem 11 (New page: == Problem == A box contains exactly five chips, three red and two white. Chips are randomly removed one at a time without replacement until all the red chips are drawn or all the white c...)
- 17:56, 15 February 2009 (diff | hist) . . (+2,033) . . N 2001 AMC 12 Problems/Problem 7 (New page: == Problem 7 == A charity sells <math>140</math> benefit tickets for a total of <dollar/><math>2001</math>. Some tickets sell for full price (a whole dollar amount), and the rest sells fo...)
- 15:22, 15 February 2009 (diff | hist) . . (+1,382) . . N 2001 AMC 12 Problems/Problem 16 (New page: == Problem == A spider has one sock and one shoe for each of its eight legs. In how many different orders can the spider put on its socks and shoes, assuming that, on each leg, the sock m...)
- 15:04, 15 February 2009 (diff | hist) . . (+692) . . 2009 AMC 12A Problems/Problem 12
- 13:55, 15 February 2009 (diff | hist) . . (+15) . . m 2001 AMC 12 Problems/Problem 25 (→See Also)
- 13:55, 15 February 2009 (diff | hist) . . (+2,188) . . N 2001 AMC 12 Problems/Problem 25 (New page: == Problem == Consider sequences of positive real numbers of the form <math>x, 2000, y, \dots</math> in which every term after the first is 1 less than the product of its two immediate ne...)
- 10:58, 15 February 2009 (diff | hist) . . (+1,647) . . N 2001 AMC 12 Problems/Problem 21 (New page: == Problem == Four positive integers <math>a</math>, <math>b</math>, <math>c</math>, and <math>d</math> have a product of <math>8!</math> and satisfy: <cmath> \begin{align*} ab + a + b &...)
- 09:11, 15 February 2009 (diff | hist) . . (+1,584) . . N 2001 AMC 12 Problems/Problem 23 (New page: == Problem == A polynomial of degree four with leading coefficient 1 and integer coefficients has two zeros, both of which are integers. Which of the following can also be a zero of the p...)
- 08:10, 15 February 2009 (diff | hist) . . (+66) . . m 2001 AMC 12 Problems/Problem 19
- 08:09, 15 February 2009 (diff | hist) . . (+59) . . m 2001 AMC 12 Problems/Problem 13
- 08:08, 15 February 2009 (diff | hist) . . (+1,514) . . N 2001 AMC 12 Problems/Problem 10 (New page: == Problem == The plane is tiled by congruent squares and congruent pentagons as indicated. The percent of the plane that is enclosed by the pentagons is closest to <math> \text{(A) }50 ...)
- 08:04, 15 February 2009 (diff | hist) . . (+70) . . m 2001 AMC 12 Problems/Problem 9
- 08:03, 15 February 2009 (diff | hist) . . (+1,694) . . N 2001 AMC 12 Problems/Problem 8 (New page: == Problem == Which of the cones listed below can be formed from a <math>252^\circ</math> sector of a circle of radius <math>10</math> by aligning the two straight sides? <asy> import g...)
- 07:54, 15 February 2009 (diff | hist) . . (+8,466) . . 2001 AMC 12 Problems
- 22:14, 14 February 2009 (diff | hist) . . (+706) . . m 2009 AMC 12A Problems/Problem 13
- 19:00, 14 February 2009 (diff | hist) . . (+1,629) . . N 2009 AMC 10A Problems/Problem 17 (New page: == Problem == Rectangle <math>ABCD</math> has <math>AB=4</math> and <math>BC=3</math>. Segment <math>EF</math> is constructed through <math>B</math> so that <math>EF</math> is perpendicula...)
- 16:19, 14 February 2009 (diff | hist) . . (+3,251) . . 2008 AMC 12B Problems/Problem 20
- 15:42, 14 February 2009 (diff | hist) . . (-1,806) . . 2008 AMC 10B Problems/Problem 25 (someone made an error when transcribing the problem, fixed it) (current)
- 15:40, 14 February 2009 (diff | hist) . . (-4) . . 2008 AMC 10B Problems (→Problem 25: someone made an error when transcribing this problem, this is now fixed)
- 14:20, 14 February 2009 (diff | hist) . . (+152) . . 2009 AMC 12A Problems/Problem 20
- 14:20, 14 February 2009 (diff | hist) . . (+46) . . N 2009 AMC 10A Problems/Problem 23 (Redirecting to 2009 AMC 12A Problems/Problem 20) (current)
- 19:38, 13 February 2009 (diff | hist) . . (+1,870) . . N 2009 AMC 10A Problems/Problem 21 (New page: == Problem == Many Gothic cathedrals have windows with portions containing a ring of congruent circles that are circumscribed by a larger circle, In the figure shown, the number of smalle...)
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