Question
Find remainder when 7Ā¹Ā³ is divided by
100.Solution
Cycle of 7 mod 100: 7Ā¹ = 07 7Ā² = 49 7Ā³ = 43 7ā“ = 01 Cycle length = 4 13 mod 4 = 1 So remainder = 7Ā¹ = 7
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