Question

Find the HCF of 72 and 90 by prime factorisation meth​

Answer 1

Answer:

Prime factorization of 72 and 90 is (2 × 2 × 2 × 3 × 3) and (2 × 3 × 3 × 5) respectively.

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GCF of 72 and 90 by Prime Factorization

GCF of 12 and 18 = 6.

GCF of 44 and 66 = 22.

GCF of 33 and 44 = 11.

GCF of 92 and 23 = 23.

GCF of 48 and 72 = 24.

GCF of 15 and 24 = 3.

GCF of 5 and 6 = 1.

Answer 2

Answer:

18

Step-by-step explanation:

GCF if 72 and 90 by prime factorization

Prime factorization of 72 and 90 is (2x2x2x3x3) and (2x3x3x5) respectively,. As visible 62 and 90 have common prime factors.

Hence the GCF of 72 and 90 is 2x3x3x=18

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