Question

Find the remainder when ${629}^{24}$ is divided by 21.

• A. 1
• B. 2
• C. 5
• D. 11

Answer 1

The correct option is A 1

When 629 is divided by 21, the remainder is -1. Thus the question changes to $\frac{(-1{)}^{24}}{21}$. Thus, remainder =1.