Difference between revisions of "2018 AMC 10B Problems"
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\textbf{(D) }6 \qquad | \textbf{(D) }6 \qquad | ||
\textbf{(E) }24 \qquad | \textbf{(E) }24 \qquad | ||
+ | </math> | ||
+ | |||
+ | == Problem 4== | ||
+ | |||
+ | A three-dimensional rectangular box with dimensions <math>X</math>, <math>Y</math>, and <math>Z</math> has faces whose surface areas are <math>24</math>, <math>24</math>, <math>48</math>, <math>48</math>, <math>72</math>, and <math>72</math> square units. What is <math>X</math> + <math>Y</math> + <math>Z</math>? | ||
+ | |||
+ | <math> | ||
+ | \textbf{(A) }18 \qquad | ||
+ | \textbf{(B) }22 \qquad | ||
+ | \textbf{(C) }24 \qquad | ||
+ | \textbf{(D) }30 \qquad | ||
+ | \textbf{(E) }36 \qquad | ||
</math> | </math> |
Revision as of 15:05, 16 February 2018
Contents
Problem 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?
Problem 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. What was his average speed, in mph, during the last 30 minutes?
Problem 3
In the expression each blank is to be filled in with one of the digits or with each digit being used once. How many different values can be obtained?
Problem 4
A three-dimensional rectangular box with dimensions , , and has faces whose surface areas are , , , , , and square units. What is + + ?