The unit digit in the sum of $(124)^372 + (124)^373$ is
Options:
A . 0
B . 5
C . 2
D . 4
Answer: Option A Answer: (a)$4^1 = 4, 4^2 = 16, 4^3 = 64, 4^4 = 256, 4^5 = 1024$Remainder on dividing 372 by 4 = 0Remainder on dividing 373 by 4 = 1Required unit digit = Unit digit of the sum of 6 + 4 = 0
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