Three numbers leave remainders 3, 5 and 6 when each is divided by 8. What is the remainder when their sum is divided by 8?

Explanation

1. 01

   The remainder of a sum equals the sum of the remainders, reduced by the divisor.

2. 02

   $3 + 5 + 6 = 14$.

3. 03

   $14 = 8 \times 1 + 6$, so the remainder is 6.