Question

The last digit of the number $3^{2015}$ is

• A. 1
• B. 3
• C. 5
• D. 7

Answer 1

Answer:

D. 7

When 2015(power) is divided by 4 2015/4 ⇒ Remainder = 3 Unit digit of 3^2015 = 3^{reminder} = 3^3 = 27 last digit = 7