Question
If (77⁷⁷ + 77) is divided by 78, then the
remainder will be:Solution
We need to find the remainder when 7777 + 77 is divided by 78. Since 77 ≡ −1mod78, then, 7777 ≡ (−1)7 ≡ −1 mod78. Hence, ans is 76
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