1. Find the HCF by prime factorisation method 60, 80, 120
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Answer:
60 = 2 × 2 × 3× 5
80 = 1 × 2 × 2 × 2 × 2 × 5
120 = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120.
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