Total number of possible 4 digit numbers = 5 × 4 × 3 × 2 = 120

Number of 4 digit numbers that end with

either 4 or 6 (ie divisible by 2) = 120 × 2/5 = **48.**

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All possible four-digit numbers, with distinct digits using digits {1, 3, 4, 5, 6}. How many of them are divisible by 2?

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