Question
What is the remainder when 7⁴ is divided by 10?
Solution
ATQ, 7² = 49, last digit 9 7³ = 7² × 7 = 49 × 7 = 343, last digit 3 7⁴ = 7³ × 7 = 343 × 7 = 2401, last digit 1 Remainder on division by 10 = last digit = 1
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