Question

Find the unit digit of 83 × 87 × 93 × 59 × 61.

• A. 9
• B. 4
• C. 7
• D. 3

Answer 1

Answer:

C. 7

Taking unit digits ⇒ 3 × 7 × 3 × 9 × 1 ⇒ 21 × 27 Again taking unit digits ⇒ 1 × 7 ⇒ 7