find hcf of 28 42 68 72
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Answer:
HCF is 2
Step-by-step explanation:
Factors of 28 = 1, 2, 4, 7, 14, 28
Factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42
Factors of 68 = 1, 2, 4, 17, 34,68
Factors of 72 = 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72.
Common Factors = 1,2
Highest Common Factor = 1×2 = 2
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