Question
If 2557Â + 819Â is divisible by
which of the following numbers.Solution
2557 + 87 = 2557 + 23 × 19 = 2557 + 257 In case of an + bn, where n is an odd number, (a + b) is one of the factors of the number. So, for 2557 + 257, 25 + 2 = 27, is one of the factors of the number.
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