2014 CEMC Gauss (Grade 7) Problems/Problem 3

Problem

Five times a number equals one hundred. The number is

$\textbf{(A)}\ 50\qquad\textbf{(B)}\ 10\qquad\textbf{(C)}\ 15\qquad\textbf{(D)}\ 25\qquad\textbf{(E)}\ 20$

Let $n$ be the number that we are looking for. Setting up an equation, we have:

$5n = 100$

$n = \boxed {\textbf {(E) } 20}$

To find the solution, we can start by multiply $20$ by $5$ since it is one of the middle numbers.

$20 * 5 = 100$ , which happens to be equal to one hundred.

Thus, the answer is $\boxed {\textbf {(E) } 20}$ .