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4. The factors of these numbers are given. Find the common factors of the pairs. 8 → 1, 2, 4, 8 15 → 1, 3, 5, 15 16 → 1, 2, 4, 8, 16 20 → 1, 2, 4, 5, 10, 20 a) 20,8 b) 15, 20: c) 16,8 : |
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