Question

Find the HCF of 12, 15, 18 and 21.
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Answer 1

Answer:

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Step-by-step explanation:

12 ,15, 18, 21 = 1 is hcf

Answer 2

12 = 3× 4

15= 3× 5

18 = 3× 6

21= 3× 7

so the HCF of 12, 15,18 and 21 is = 3.