Question
Find the remainder when the number (225n + 169) is
divided by 15.Solution
ATQ, 225n + 169 = (15 × 15n) + (15 × 11) + 4 = 15 × (15n + 11) + 4 Since, 15 × (15n + 11) is completely divisible by 15 So, the remainder will be 4.
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COGENT
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