Question

find the HCF of 45,60,90 by prime factorisation method (pls don't give direct answer)​

Answer 1

Answer:

first we find all the factors of 45,60and90

45=5×3×3

60=2×2×3×5

90=2×3×3×5

we see that 3×5 are common in the factor of 45,60,90

then 15 is HCF

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