Question

find HCF of 80 by prime factorisation method
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Answer 1

Answer:

80 = 1 × 2 × 2 × 2 × 2 × 5. Common factor of 64 and 80 = 1, 2, 2, 2, 2. Highest common factor of 64 and 80 = 2 × 2 × 2 × 2 = 16.

Answer 2

Answer:

$2|80| \\ 2 |40| \\ 2 |20| \\ 2|10| \\ |5|$

HCF : 2×2×2×2 = 16