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Question

What is the unit digit in 7105 ?


Options:
A .  1
B .  5
C .  7
D .  9
Answer: Option C

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

But, unit digit in (74)26 = 1

What Is The Unit Digit In 7105 ? Unit digit in 7105 = (1 x 7) = 7


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