Art of Problem Solving

AoPS Online

2021 AMC 10B Problems/Problem 1

Revision as of 17:31, 11 February 2021 by Bjc (talk | contribs) (Removed redirect to 2021 AMC 12B Problems/Problem 1)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Problem

How many integer values of $x$ satisfy $|x|<3\pi$ ?

$\textbf{(A)} ~9 \qquad\textbf{(B)} ~10 \qquad\textbf{(C)} ~18 \qquad\textbf{(D)} ~19 \qquad\textbf{(E)} ~20$

Solution

Since $3\pi$ is about $9.42$ , we multiply 9 by 2 and add 1 to get $\boxed{\textbf{(D)}\ ~19}$ ~smarty101

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=2021_AMC_10B_Problems/Problem_1&oldid=145308"

© 2024 AoPS Incorporated