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What is the unit digit in 7105 ?

/ Aptitude, Numbers / By
Question:
What is the unit digit in 7105 ?

[A].

1

[B].

5

[C].

7

[D].

9

Answer: Option C

Explanation:

Unit digit in 7105 = Unit digit in [ (74)26 x 7 ]

But, unit digit in (74)26 = 1

Unit digit in 7105 = (1 x 7) = 7