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The unit’s digit in the product \((3127)^{173}\)  is:

  • A.1
  • B.3
  • C.7
  • D.9

Answer: C

Unit digit in \((3127)^{173}\)  =  Unit digit in 7173. Now, 74 gives unit digit 1
Therefore, \(7173= (74)43 \times 71\). Thus, 7173 gives unit digit 7

MojiborMarch 18, 2018, 7:24 am

In view answer 7173 should appear as \(7^{173}\) , 74 as \(7^{4}\).

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