Find the unit digit of (7^95 – 3^58).

A0

B4

C6

D7

Explanation

7^95: 95/4 rem 3, 7^3 ends in 3. 3^58: 58/4 rem 2, 3^2 ends in 9. 3-9 -> borrow -> 13-9 = 4.

Exam Relevance

Topic: Number System
Subtopic: Unit Digit

Submitted by: mcqstutor Team More Mathematics MCQs →