A) 5
B) 2
C) 7
D) None of these
Correct Answer: D
Solution :
\[{{(4378)}^{245}}\times {{(621)}^{72}}={{(....8)}^{245}}\times {{(....1)}^{72}}\] \[=(....8)\times (....1)\] \[=....8\] Hence, the unit digit in the product as 8.
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