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Question


What is the unit digit in (4137)754?


Options:
A .  1
B .  3
C .  7
D .  9
Answer: Option D

Unit digit in (4137)754 = Unit digit in {[(4137)4]188 x (4137)2}


=Unit digit in { 292915317923361 x 17114769 }


= (1 x 9) = 9




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