What number should be placed in the box to make $\frac{6+\square}{20}=\frac{1}{2}$ ?
(A) 10
(B) 4
(C) -5
(D) 34
(E) 14
What number should be placed in the box to make $\frac{6+\square}{20}=\frac{1}{2}$ ?
(A) 10
(B) 4
(C) -5
(D) 34
(E) 14

Solution

Expressing $\frac{1}{2}$ as a fraction with denominator 20 , we get $\frac{10}{20}$.

So $\frac{6+\square}{20}=\frac{10}{20}$. Comparing the numerators, $6+\square=10$, so the number to place in the box is 4 .

ANsWer: (B)