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Prime factorization of 48 = 2 x 2 x 2 x 2 x 3

Prime factorization of 18 = 2 x 3 x 3

From the factorization of both numbers it is clear that 1, 2, 3 and 2x3 are common divisors. But 2x3 = 6 is the greatest among these, so GCD(48,18) = 6.

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13y ago

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