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2013 AMC 10A

Question 1

A taxi ride costs $\$1.50$ plus $\$0.25$ per mile traveled. How much does a $5$-mile taxi ride cost?
  1. $\$2.25$
  2. $\$2.50$
  3. $\$2.75$
  4. $\$3.00$
  5. $\$3.25$

Question 2

Alice is making a batch of cookies and needs $2\frac{1}{2}$ cups of sugar. Unfortunately, her measuring cup holds only $\frac{1}{4}$ cup of sugar. How many times must she fill that cup to get the correct amount of sugar?
  1. $8$
  2. $10$
  3. $12$
  4. $16$
  5. $20$

Question 3

Square $ABCD$ has side length $10.$ Point $E$ is on $\overline{BC},$ and the area of $\triangle ABE$ is $40.$ What is $BE?$

Question illustration
  1. $4$
  2. $5$
  3. $6$
  4. $7$
  5. $8$

Question 4

A softball team played ten games, scoring $1,$ $2,$ $3,$ $4,$ $5,$ $6,$ $7,$ $8,$ $9,$ and $10$ runs. They lost by one run in exactly five games. In each of their other games, they scored twice as many runs as their opponent. How many total runs did their opponents score?
  1. $35$
  2. $40$
  3. $45$
  4. $50$
  5. $55$

Question 5

Tom, Dorothy, and Sammy went on a vacation and agreed to split the costs evenly. During their trip Tom paid $\$105,$ Dorothy paid $\$125,$ and Sammy paid $\$175.$ In order to share costs equally, Tom gave Sammy $t$ dollars, and Dorothy gave Sammy $d$ dollars. What is $t-d?$
  1. $15$
  2. $20$
  3. $25$
  4. $30$
  5. $35$

Question 6

Joey and his five brothers are ages $3,$ $5,$ $7,$ $9,$ $11,$ and $13.$ One afternoon two of his brothers whose ages sum to $16$ went to the movies, two brothers younger than $10$ went to play baseball, and Joey and the $5$-year-old stayed home. How old is Joey?
  1. $3$
  2. $7$
  3. $9$
  4. $11$
  5. $13$

Question 7

A student must choose a program of four courses from a menu of courses consisting of English, Algebra, Geometry, History, Art, and Latin. This program must contain English and at least one mathematics course. In how many ways can this program be chosen?
  1. $6$
  2. $8$
  3. $9$
  4. $12$
  5. $16$

Question 8

What is the value of $$
\dfrac{2^{2014}+2^{2012}}{2^{2014}-2^{2012}} ?
$$
  1. $-1$
  2. $1$
  3. $\dfrac{5}{3}$
  4. $2013$
  5. $2^{4024}$

Question 9

In a recent basketball game, Shenille attempted only three-point shots and two-point shots. She was successful on $20\%$ of her three-point shots and $30\%$ of her two-point shots. Shenille attempted $30$ shots. How many points did she score?
  1. $12$
  2. $18$
  3. $24$
  4. $30$
  5. $36$

Question 10

A flower bouquet contains pink roses, red roses, pink carnations, and red carnations. One third of the pink flowers are roses, three fourths of the red flowers are carnations, and six tenths of the flowers are pink. What percent of the flowers are carnations?
  1. $15$
  2. $30$
  3. $40$
  4. $60$
  5. $70$

Question 11

A student council must select a two-person welcoming committee and a three-person planning committee from among its members. There are exactly $10$ ways to select a two-person team for the welcoming committee. It is possible for students to serve on both committees. In how many different ways can a three-person planning committee be selected?
  1. $10$
  2. $12$
  3. $15$
  4. $18$
  5. $25$

Question 12

In $\triangle ABC,$ $AB=AC=28$ and $BC=20.$ Points $D,$ $E,$ and $F$ are on sides $\overline{AB},$ $\overline{BC},$ and $\overline{AC},$ respectively, such that $\overline{DE}$ and $\overline{EF}$ are parallel to $\overline{AC}$ and $\overline{AB},$ respectively. What is the perimeter of parallelogram $ADEF?$

Question illustration
  1. $48$
  2. $52$
  3. $56$
  4. $60$
  5. $72$

Question 13

How many three-digit numbers are not divisible by $5,$ have digits that sum to less than $20,$ and have the first digit equal to the third digit?
  1. $52$
  2. $60$
  3. $66$
  4. $68$
  5. $70$

Question 14

A solid cube of side length $1$ is removed from each corner of a solid cube of side length $3.$ How many edges does the remaining solid have?
  1. $36$
  2. $60$
  3. $72$
  4. $84$
  5. $108$

Question 15

Two sides of a triangle have lengths $10$ and $15.$ The length of the altitude to the third side is the average of the lengths of the altitudes to the two given sides. How long is the third side?
  1. $6$
  2. $8$
  3. $9$
  4. $12$
  5. $18$

Question 16

A triangle with vertices $(6, 5),$ $(8, -3),$ and $(9, 1)$ is reflected about the line $x = 8$ to create a second triangle. What is the area of the union of the two triangles?
  1. $9$
  2. $\dfrac{28}{3}$
  3. $10$
  4. $\dfrac{31}{3}$
  5. $\dfrac{32}{3}$

Question 17

Daphne is visited periodically by her three best friends: Alice, Beatrix, and Claire. Alice visits every third day, Beatrix visits every fourth day, and Claire visits every fifth day.

All three friends visited Daphne yesterday. How many days of the next $365$-day period will exactly two friends visit her?
  1. $48$
  2. $54$
  3. $60$
  4. $66$
  5. $72$

Question 18

Let points $A=(0,0),$ $B=(1,2),$ $C=(3,3),$ and $D=(4,0).$ Quadrilateral $ABCD$ is cut into equal area pieces by a line passing through $A.$ This line intersects $\overline{CD}$ at point $\left(\dfrac{p}{q}, \dfrac{r}{s}\right),$ where these fractions are in lowest terms. What is $p+q+r+s?$
  1. $54$
  2. $58$
  3. $62$
  4. $70$
  5. $75$

Question 19

In base $10,$ the number $2013$ ends in the digit $3.$ In base $9,$ on the other hand, the same number is written as $(2676)_9$ and ends in the digit $6.$ For how many positive integers $b$ does the base-$b$-representation of $2013$ end in the digit $3?$
  1. $6$
  2. $9$
  3. $13$
  4. $16$
  5. $18$

Question 20

A unit square is rotated $45^\circ$ about its center. What is the area of the region swept out by the interior of the square?
  1. $1 - \dfrac{\sqrt2}{2} + \dfrac{\pi}{4}$
  2. $\dfrac{1}{2} + \dfrac{\pi}{4}$
  3. $2 - \sqrt2 + \dfrac{\pi}{4}$
  4. $\dfrac{\sqrt2}{2} + \dfrac{\pi}{4}$
  5. $1 + \dfrac{\sqrt2}{4} + \dfrac{\pi}{8}$