# User contributions

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- 14:31, 16 February 2018 (diff | hist) . . (-99) . . 2018 AMC 10B Problems/Problem 10
- 14:30, 16 February 2018
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**(+1,100)** . . N 2018 AMC 10B Problems/Problem 10 (Created page with "In the rectangular parallelpiped shown, <math>AB</math> = 3, <math>BC</math> = 1, and <math>CG</math> = 2. Point <math>M</math> is the midpoint of <math>\overline{FG}</math>....") - 13:30, 16 February 2018 (diff | hist) . . (+229) . . N 2018 AMC 10B Problems/Problem 25 (Created page with "How many <math>x</math> satisfy the equation <math>x^2 + 10,000\lfloor x \rfloor = 10,000x</math>? <math>\textbf{(A) } 197 \qquad \textbf{(B) } 198 \qquad \textbf{(C) } 199 \q...")
- 13:30, 16 February 2018 (diff | hist) . . (-465) . . 2018 AMC 10B Problems/Problem 16 (Blanked the page)
- 13:29, 16 February 2018 (diff | hist) . . (+465) . . N 2018 AMC 10B Problems/Problem 16 (Created page with "Joey and Chloe and their daughter Zoe all have the same birthday. Joey is 1 year older than Chloe, and Zoe is exactly 1 year old today. Today is the first of the 9 birthdays o...")
- 13:27, 16 February 2018 (diff | hist) . . (-3) . . 2018 AMC 10B Problems/Problem 1
- 13:27, 16 February 2018 (diff | hist) . . (-3) . . 2018 AMC 10B Problems/Problem 2
- 13:27, 16 February 2018 (diff | hist) . . (+365) . . N 2018 AMC 10B Problems/Problem 2 (Created page with "2. Sam drove 96 miles in 90 minutes. His average speed during the first 30 minutes was 60 mph (miles per hour), and his average speed during the second 30 minutes was 65 mph....")
- 13:27, 16 February 2018 (diff | hist) . . (+300) . . N 2018 AMC 10B Problems/Problem 1 (Created page with "1. Kate bakes 20-inch by 18-inch pan of cornbread. The cornbread is cut into pieces that measure 2 inches by 2 inches. How many pieces of cornbread does the pan contain? <mat...")
- 14:58, 8 February 2018 (diff | hist) . . (+79) . . 2018 AMC 10A Problems/Problem 13
- 14:58, 8 February 2018 (diff | hist) . . (+79) . . 2018 AMC 10A Problems/Problem 12
- 14:58, 8 February 2018 (diff | hist) . . (+79) . . 2018 AMC 10A Problems/Problem 11
- 14:58, 8 February 2018 (diff | hist) . . (+78) . . 2018 AMC 10A Problems/Problem 10
- 14:57, 8 February 2018 (diff | hist) . . (+78) . . 2018 AMC 10A Problems/Problem 9
- 14:57, 8 February 2018 (diff | hist) . . (+77) . . 2018 AMC 10A Problems/Problem 8
- 14:56, 8 February 2018 (diff | hist) . . (+77) . . 2018 AMC 10A Problems/Problem 7
- 14:56, 8 February 2018 (diff | hist) . . (+77) . . 2018 AMC 10A Problems/Problem 6
- 14:55, 8 February 2018 (diff | hist) . . (+77) . . 2018 AMC 10A Problems/Problem 5
- 14:55, 8 February 2018 (diff | hist) . . (+77) . . 2018 AMC 10A Problems/Problem 3
- 14:54, 8 February 2018 (diff | hist) . . (-1) . . 2018 AMC 10A Problems/Problem 2 (→See Also)
- 14:54, 8 February 2018 (diff | hist) . . (+78) . . 2018 AMC 10A Problems/Problem 2
- 14:53, 8 February 2018 (diff | hist) . . (0) . . 2018 AMC 10A Problems/Problem 1 (→See Also)
- 14:53, 8 February 2018 (diff | hist) . . (+74) . . 2018 AMC 10A Problems/Problem 1 (→Solution)
- 13:57, 8 February 2018 (diff | hist) . . (+395) . . N 2018 AMC 10A Problems/Problem 21 (Created page with "Which of the following describes the set of values of <math>a</math> for which the curves <math>x^2+y^2=a^2</math> and <math>y=x^2-a</math> in the real <math>xy</math>-plane i...")
- 13:56, 8 February 2018 (diff | hist) . . (+378) . . N 2018 AMC 10A Problems/Problem 18 (Created page with "How many nonnegative integers can be written in the form <cmath>a_7\cdot3^7+a_6\cdot3^6+a_5\cdot3^5+a_4\cdot3^4+a_3\cdot3^3+a_2\cdot3^2+a_1\cdot3^1+a_0\cdot3^0,</cmath> where...")
- 13:55, 8 February 2018
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**(+819)** . . N 2018 AMC 10A Problems/Problem 9 (Created page with "All of the triangles in the diagram below are similar to iscoceles triangle <math>ABC</math>, in which <math>AB=AC</math>. Each of the 7 smallest triangles has area 1, and <ma...") - 13:55, 8 February 2018 (diff | hist) . . (+407) . . N 2018 AMC 10A Problems/Problem 8 (Created page with "Joe has a collection of 23 coins, consisting of 5-cent coins, 10-cent coins, and 25-cent coins. He has 3 more 10-cent coins than 5-cent coins, and the total value of his colle...")
- 13:54, 8 February 2018 (diff | hist) . . (+277) . . N 2018 AMC 10A Problems/Problem 7 (Created page with "For how many (not necessarily positive) integer values of <math>n</math> is the value of <math>4000\cdot \left(\tfrac{2}{5}\right)^n</math> an integer? <math> \textbf{(A) }3...")
- 13:52, 8 February 2018
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**(+648)** . . N 2018 AMC 10A Problems/Problem 5 (Created page with "Alice, Bob, and Charlie were on a hike and were wondering how far away the nearest town was. When Alice said, "We are at least 6 miles away," Bob replied, "We are at most 5 mi...") - 13:51, 8 February 2018 (diff | hist) . . (+381) . . N 2018 AMC 10A Problems/Problem 4 (Created page with "How many ways can a student schedule 3 mathematics courses -- algebra, geometry, and number theory -- in a 6-period day if no two mathematics courses can be taken in consecuti...")
- 13:29, 8 February 2018 (diff | hist) . . (+415) . . N 2018 AMC 10A Problems/Problem 22 (Created page with "Let <math>a, b, c,</math> and <math>d</math> be positive integers such that <math>\gcd(a, b)=24</math>, <math>\gcd(b, c)=36</math>, <math>\gcd(c, d)=54</math>, and <math>70<\g...")
- 13:27, 8 February 2018
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**(+578)** . . N 2018 AMC 10A Problems/Problem 6 (Created page with "Sangho uploaded a video to a website where viewers can vote that they like or dislike a video. Each video begins with a score of 0, and the score increases by 1 for each like...") - 13:24, 8 February 2018
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**(+671)** . . N 2018 AMC 10A Problems/Problem 15 (Created page with "Two circles of radius 5 are externally tangent to each other and are internally tangent to a circle of radius 13 at points <math>A</math> and <math>B</math>, as shown in the...") - 13:22, 8 February 2018 (diff | hist) . . (+424) . . N 2018 AMC 10A Problems/Problem 16 (Created page with "Right triangle <math>ABC</math> has leg lengths <math>AB=20</math> and <math>BC=21</math>. Including <math>\overline{AB}</math> and <math>\overline{BC}</math>, how many line s...")
- 13:16, 8 February 2018
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**(+586)** . . N 2018 AMC 10A Problems/Problem 24 (Created page with "Triangle <math>ABC</math> with <math>AB=50</math> and <math>AC=10</math> has area <math>120</math>. Let <math>D</math> be the midpoint of <math>\overline{AB}</math>, and let <...") - 13:14, 8 February 2018 (diff | hist) . . (+474) . . N 2018 AMC 10A Problems/Problem 19 (Created page with "A number <math>m</math> is randomly selected from the set <math>\{11,13,15,17,19\}</math>, and a number <math>n</math> is randomly selected from <math>\{1999,2000,2001,\ldots,...")
- 13:13, 8 February 2018
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**(+927)** . . N 2018 AMC 10A Problems/Problem 23 (Created page with "Farmer Pythagoras has a field in the shape of a right triangle. The right triangle's legs have lengths 3 and 4 units. In the corner where those sides meet at a right angle, he...") - 13:12, 8 February 2018 (diff | hist) . . (+433) . . N 2018 AMC 10A Problems/Problem 17 (Created page with "Let <math>S</math> be a set of 6 integers taken from <math>\{1,2,\dots,12\}</math> with the property that if <math>a</math> and <math>b</math> are elements of <math>S</math> w...")
- 13:12, 8 February 2018 (diff | hist) . . (+383) . . N 2018 AMC 10A Problems/Problem 11 (Created page with "When 7 fair standard 6-sided dice are thrown, the probability that the sum of the numbers on the top faces is 10 can be written as <cmath>\frac{n}{6^7},</cmath>where <math>n</...")
- 13:10, 8 February 2018 (diff | hist) . . (+283) . . N 2018 AMC 10A Problems/Problem 12 (Created page with "How many ordered pairs of real numbers <math>(x,y)</math> satisfy the following system of equations? \begin{align*}x+3y&=3\\ \big||x|-|y|\big|&=1\end{align*} <math>\textbf{(A)...")
- 13:10, 8 February 2018 (diff | hist) . . (+365) . . N 2018 AMC 10A Problems/Problem 3 (Created page with "A unit of blood expires after <math>10!=10\cdot 9 \cdot 8 \cdots 1</math> seconds. Yasin donates a unit of blood at noon of January 1. On what day does his unit of blood expir...")
- 13:09, 8 February 2018
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**(+782)** . . N 2018 AMC 10A Problems/Problem 25 (Created page with "For a positive integer <math>n</math> and nonzero digits <math>a</math>, <math>b</math>, and <math>c</math>, let <math>A_n</math> be the <math>n</math>-digit integer each of w...") - 13:08, 8 February 2018
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**(+590)** . . N 2018 AMC 10A Problems/Problem 2 (Created page with "Liliane has <math>50\%</math> more soda than Jacqueline, and Alice has <math>25\%</math> more soda than Jacqueline. What is the relationship between the amounts of soda that L...") - 13:07, 8 February 2018 (diff | hist) . . (+305) . . N 2018 AMC 10A Problems/Problem 10 (Created page with "Suppose that real number <math>x</math> satisfies <cmath>\sqrt{49-x^2}-\sqrt{25-x^2}=3</cmath>. What is the value of <math>\sqrt{49-x^2}+\sqrt{25-x^2}</math>? <math> \textbf{...")
- 13:06, 8 February 2018
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**(+756)** . . N 2018 AMC 10A Problems/Problem 20 (Created page with "A scanning code consists of a <math>7 \times 7</math> grid of squares, with some of its squares colored black and the rest colored white. There must be at least one square of...") - 13:03, 8 February 2018 (diff | hist) . . (-66) . . 2018 AMC 10A Problems/Problem 13
- 13:03, 8 February 2018
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**(+680)** . . N 2018 AMC 10A Problems/Problem 13 (Created page with "A paper triangle with sides of lengths 3,4, and 5 inches, as shon, is folded so that point <math>A</math> falls on point <math>B</math>. What is the length in inches of the cr...") - 13:00, 8 February 2018 (diff | hist) . . (+234) . . N 2018 AMC 10A Problems/Problem 14 (Created page with "What is the greatest integer less than or equal to <cmath>\frac{3^{100}+2^{100}}{3^{96}+2^{96}}?</cmath> <math> \textbf{(A) }80\qquad \textbf{(B) }81 \qquad \textbf{(C) }96 \...")
- 12:58, 8 February 2018 (diff | hist) . . (-40) . . 2018 AMC 10A Answer Key (current)
- 12:57, 8 February 2018 (diff | hist) . . (+111) . . 2018 AMC 10A Answer Key

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