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Question
Find the HCF of the following number.
120, 144
Solution
Factors of 120: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
Factors of 144: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144
Common factors of 120 and 144: 1, 2, 3, 4, 6, 8, 12, 24
∴ HCF of 120 and 144 = 24
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