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This question belongs to Arithmetic Ability Number System
Number System
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The remainder of $$\frac{{{{39}^{97!}}}}{{40}}$$ is :

Answer & Solution
Correct Answer: Option C
Since, $$\frac{{{{\text{a}}^{\text{n}}}}}{{{\text{a}} + 1}}$$   gives remainder 1 when 'n' is even.
Now since, 97! is an even number so remainder will be 1.
Note:-Factorial of any no. is even.
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1 Comment
Ojas Maheshwary
Ojas Maheshwary 9 years ago
the ans option is "c"