Question
When a number is divided by 19 remainder is 7. Find the
remainder when four times of the same number is divided by 19.Solution
Number = (19A + 7), where 'A' is constant. Therefore, required remainder = [4 × (19A + 7)] ÷ 19 = (76A + 28) ÷ 19 = (76A + 19 + 9) ÷ 19 = 9
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