21 November 2018

• 11:0511:05, 21 November 2018 diff hist +58 2018 AMC 8 Problems/Problem 19 →Problem 19
• 11:0511:05, 21 November 2018 diff hist +58 2018 AMC 8 Problems/Problem 18 →Problem 18
• 11:0411:04, 21 November 2018 diff hist +58 2018 AMC 8 Problems/Problem 17 →Problem 17
• 11:0311:03, 21 November 2018 diff hist +57 2018 AMC 8 Problems/Problem 16 →Problem 16
• 11:0211:02, 21 November 2018 diff hist +57 2018 AMC 8 Problems/Problem 15 No edit summary
• 11:0111:01, 21 November 2018 diff hist +42 2018 AMC 8 Problems/Problem 14 →Problem 14
• 11:0011:00, 21 November 2018 diff hist +41 2018 AMC 8 Problems/Problem 13 →Problem 13
• 11:0011:00, 21 November 2018 diff hist +41 2018 AMC 8 Problems/Problem 12 →Problem 12
• 11:0011:00, 21 November 2018 diff hist +41 2018 AMC 8 Problems/Problem 11 →Problem 11
• 10:5810:58, 21 November 2018 diff hist +40 2018 AMC 8 Problems/Problem 10 →Problem 10
• 10:5810:58, 21 November 2018 diff hist +40 2018 AMC 8 Problems/Problem 9 →Problem 9
• 10:5810:58, 21 November 2018 diff hist 0 2018 AMC 8 Problems/Problem 8 →Problem 8
• 10:5810:58, 21 November 2018 diff hist +39 2018 AMC 8 Problems/Problem 8 →Problem 8
• 10:5710:57, 21 November 2018 diff hist +39 2018 AMC 8 Problems/Problem 7 →Problem 7
• 10:5710:57, 21 November 2018 diff hist +39 2018 AMC 8 Problems/Problem 6 →Problem 6
• 10:5610:56, 21 November 2018 diff hist +39 2018 AMC 8 Problems/Problem 5 →Problem 5
• 10:5510:55, 21 November 2018 diff hist +59 2018 AMC 8 Problems No edit summary
• 10:5210:52, 21 November 2018 diff hist +1 2018 AMC 8 Problems →Problem 1
• 10:5210:52, 21 November 2018 diff hist +3 2018 AMC 8 Problems →Problem 1
• 10:5110:51, 21 November 2018 diff hist −3 2018 AMC 8 Problems →Problem 1
• 10:5110:51, 21 November 2018 diff hist +2 2018 AMC 8 Problems →Problem 1
• 10:5110:51, 21 November 2018 diff hist +1,018 2018 AMC 8 Problems No edit summary
• 09:5909:59, 21 November 2018 diff hist −15 2018 AMC 8 Problems No edit summary
• 09:5509:55, 21 November 2018 diff hist +219 N 2018 AMC 8 Problems/Problem 25 Created page with "==Problem 25== How many perfect cubes lie between <math>2^8+1</math> and <math>2^{18}+1</math>, inclusive? <math>\textbf{(A) }4\qquad\textbf{(B) }9\qquad\textbf{(C) }10\qquad..."
• 09:5409:54, 21 November 2018 diff hist +1,155 N 2018 AMC 8 Problems/Problem 24 Created page with "==Problem 24== In the cube <math>ABCDEFGH</math> with opposite vertices <math>C</math> and <math>E,</math> <math>J</math> and <math>I</math> are the midpoints of edges <math>\..."
• 09:5409:54, 21 November 2018 diff hist +609 N 2018 AMC 8 Problems/Problem 23 Created page with "==Problem 23== From a regular octagon, a triangle is formed by connecting three randomly chosen vertices of the octagon. What is the probability that at least one of the sides..."
• 09:5409:54, 21 November 2018 diff hist +684 N 2018 AMC 8 Problems/Problem 22 Created page with "==Problem 22== Point <math>E</math> is the midpoint of side <math>\overline{CD}</math> in square <math>ABCD,</math> and <math>\overline{BE}</math> meets diagonal <math>\overli..."
• 09:5409:54, 21 November 2018 diff hist +110 2018 AMC 8 Problems/Problem 21 No edit summary
• 09:5309:53, 21 November 2018 diff hist +171 N 2018 AMC 8 Problems/Problem 21 Created page with "==Problem 21== How many positive three-digit integers have a remainder of 2 when divided by 6, a remainder of 5 when divided by 9, and a remainder of 7 when divided by 11?"
• 09:5309:53, 21 November 2018 diff hist +1,027 N 2018 AMC 8 Problems/Problem 20 Created page with "==Problem 20== In <math>\triangle ABC,</math> a point <math>E</math> is on <math>\overline{AB}</math> with <math>AE=1</math> and <math>EB=2.</math> Point <math>D</math> is on..."
• 09:5309:53, 21 November 2018 diff hist +1,011 N 2018 AMC 8 Problems/Problem 19 Created page with "==Problem 19== In a sign pyramid a cell gets a "+" if the two cells below it have the same sign, and it gets a "-" if the two cells below it have different signs. The diagram..."
• 09:5309:53, 21 November 2018 diff hist +184 N 2018 AMC 8 Problems/Problem 18 Created page with "==Problem 18== How many positive factors does <math>23,232</math> have? <math>\textbf{(A) }9\qquad\textbf{(B) }12\qquad\textbf{(C) }28\qquad\textbf{(D) }36\qquad\textbf{(E) }..."
• 09:5309:53, 21 November 2018 diff hist +123 2018 AMC 8 Problems/Problem 17 No edit summary
• 09:5209:52, 21 November 2018 diff hist +457 N 2018 AMC 8 Problems/Problem 17 Created page with "==Problem 17== Bella begins to walk from her house toward her friend Ella's house. At the same time, Ella begins to ride her bicycle toward Bella's house. They each maintain a..."
• 09:5209:52, 21 November 2018 diff hist +401 N 2018 AMC 8 Problems/Problem 16 Created page with "==Problem 16== Professor Chang has nine different language books lined up on a bookshelf: two Arabic, three German, and four Spanish. How many ways are there to arrange the ni..."
• 09:5109:51, 21 November 2018 diff hist +578 N 2018 AMC 8 Problems/Problem 15 Created page with "==Problem 15== In the diagram below, a diameter of each of the two smaller circles is a radius of the larger circle. If the two smaller circles have a combined area of <math>1..."
• 09:5109:51, 21 November 2018 diff hist +279 N 2018 AMC 8 Problems/Problem 14 Created page with "==Problem 14== Let <math>N</math> be the greatest five-digit number whose digits have a product of <math>120</math>. What is the sum of the digits of <math>N</math>? <math>\t..."
• 09:5109:51, 21 November 2018 diff hist +476 N 2018 AMC 8 Problems/Problem 13 Created page with "==Problem 13== Laila took five math tests, each worth a maximum of 100 points. Laila's score on each test was an integer between 0 and 100, inclusive. Laila received the same..."
• 09:5109:51, 21 November 2018 diff hist +513 N 2018 AMC 8 Problems/Problem 12 Created page with "==Problem 12== The clock in Sri's car, which is not accurate, gains time at a constant rate. One day as he begins shopping he notes that his car clock and his watch (which is..."
• 09:5109:51, 21 November 2018 diff hist +567 N 2018 AMC 8 Problems/Problem 11 Created page with "==Problem 11== Abby, Bridget, and four of their classmates will be seated in two rows of three for a group picture, as shown. \begin{eqnarray*} \text{X}&\quad\text{X}\quad&\te..."
• 09:4809:48, 21 November 2018 diff hist +340 N 2018 AMC 8 Problems/Problem 10 Created page with "==Problem 10== The [i]harmonic mean[/i] of a set of non-zero numbers is the reciprocal of the average of the reciprocals of the numbers. What is the harmonic mean of 1, 2, and..."
• 09:4809:48, 21 November 2018 diff hist +396 N 2018 AMC 8 Problems/Problem 9 Created page with "==Problem 9== Tyler is tiling the floor of his 12 foot by 16 foot living room. He plans to place one-foot by one-foot square tiles to form a border along the edges of the room..."
• 09:4709:47, 21 November 2018 diff hist +1,130 N 2018 AMC 8 Problems/Problem 8 Created page with "==Problem 8== Mr. Garcia asked the members of his health class how many days last week they exercised for at least 30 minutes. The results are summarized in the following bar..."
• 09:4709:47, 21 November 2018 diff hist +390 N 2018 AMC 8 Problems/Problem 7 Created page with "==Problem 7== The <math>5</math>-digit number <math>\underline{2}</math> <math>\underline{0}</math> <math>\underline{1}</math> <math>\underline{8}</math> <math>\underline{U}</..."
• 09:4709:47, 21 November 2018 diff hist +393 N 2018 AMC 8 Problems/Problem 6 Created page with "==Problem 6== On a trip to the beach, Anh traveled 50 miles on the highway and 10 miles on a coastal access road. He drove three times as fast on the highway as on the coastal..."
• 09:4709:47, 21 November 2018 diff hist +221 N 2018 AMC 8 Problems/Problem 5 Created page with "==Problem 5== What is the value of <math>1+3+5+\cdots+2017+2019-2-4-6-\cdots-2016-2018</math>? <math>\textbf{(A) }-1010\qquad\textbf{(B) }-1009\qquad\textbf{(C) }1008\qquad\t..."
• 09:4609:46, 21 November 2018 diff hist 0 2018 AMC 8 No edit summary
• 09:4509:45, 21 November 2018 diff hist +993 N 2018 AMC 8 Created page with "*2017 AMC 8 Problems * 2017 AMC 8 Answer Key ** 2017 AMC 8 Problems/Problem 1 ** 2017 AMC 8 Problems/Problem 2 ** 2017 AMC 8 Problems/Problem 3 ** 2017 A..."
• 09:1809:18, 21 November 2018 diff hist +571 N 2018 AMC 8 Problems/Problem 4 Created page with "==Problem 4== The twelve-sided figure shown has been drawn on <math>1 \text{ cm}\times 1 \text{ cm}</math> graph paper. What is the area of the figure in <math>\text{cm}^2</ma..."
• 09:1709:17, 21 November 2018 diff hist 0 2018 AMC 8 Problems/Problem 3 →Problem 3