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Railways PYQCBT 1 2016

RRB NTPC · Question 32

Find the unit digit in the given factor (3451)^51 × (531)^43. A. 6 B. 4 C. 1 D. 9

  1. B

  2. C

  3. D

  4. A

Show answer & explanation

Answer: (B) C

Explanation

Any power of a number ending in 1 ends in 1. So both factors end in 1 and their product ends in 1.