Use Fermat's Little theorem to solve: 6^400 (mod 37)
Fermat's Little theorem : If p is a prime number, then for any integer a, the number is an integer multiple of p that is .
Since is a prime number and is an integer so by Fermat's Little theorem ,
[ raising power to 11 ]
[ multiplying both side by 64 ]
Hence is
Answer : 1 .
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