If m and n are positive integers, then the digit in the unit's place of 5ⁿ + 6^m is always :

A. 1

B. 5

C. 6

D. n + m

Answer: Option A

Solution(By Examveda Team)

In 5ⁿ we have 5 as unit digit and in 6^m we have 6 as unit digit.
∴ 5 + 6 = 11(i.e unit digit always be 1)