The digit in the unit place of the number represented by (795 - 358) is :
Options:
A . 0
B . 4
C . 6
D . 7
Answer: Option B Unit digit of 74 is 1. So, the unit digit of (74)23 is 1 ∴ Unit digit of 795 = Unit digit of (792 × 73) = (1 × 3) = 3 Unit digit of 34 is 1 So, the unit digit of (34)14 is 1 ∴ Unit digit of 358 = unit digit of (356 × 32 ) = (1 × 9) = 9 Hence, the unit digit of (795 - 3) = (13 - 9) = 4
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