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To find the HCF of two numbers you first have to express them as a product of their prime factors. In this case:
15 = 3x5
39 = 3x13
The next step is to identify any common prime factors. In this case, both numbers have 3 as a prime factor. Therefore the HCF of 15 and 39 is 3.
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Related Questions
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What is the hcf of 13 and 39 multiply by 4 and 3?
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What numbers can go into 39 and 20?
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Hcf of 39 156 169?
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What is the hcf and lcm of 5 and 15?
hcf(5, 15) = 5 lcm(5, 15) = 15.
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The GCF is 15.
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