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Railways PYQCBT 1 2016

RRB NTPC · Question 34

Find the unit digit in the given product (4211)^102 × (361)^52

  1. 3

  2. 1

  3. 4

  4. 7

Show answer & explanation

Answer: (B) 1

Explanation

Both 4211 and 361 end in 1, and any power of a number ending in 1 also ends in 1. So the product ends in 1 × 1 = 1.