A) 9
B) 3
C) 4
D) 7
Correct Answer: A
Solution :
Desired digit = Unit digit in \[{{(7)}^{754}}\] = Unit digit in \[\{{{({{7}^{4}})}^{188}}\times {{7}^{2}}\}=\] Unit digit in \[(1\times 49)=9\] \[\therefore \] Unit digit in \[{{(3157)}^{754}}\]is 9.You need to login to perform this action.
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