Question 80801
2 to the 5th power mod. 5 =32 mod 5 = 2 mod 5
2 to the 55th power mod. 5 = (2^5)^11 = 2^11= 2048= 3 mod 5
-2 to the 5th power mod. 5 =-32 = -2 = 3 mod 5
(-2) to the 5th power mod. 5 =(-32) = -2 = 3 mod 5
3/2 mod. 5 = (3+5)/2 = 4 mod 5
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Cheers,
Stan H.