Find HCF of 54,72,90 by prime factorisation method
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Answer:
18
Step-by-step explanation:
The factors of 54 are: 1, 2, 3, 6, 9, 18, 27, 54
The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Then the greatest common factor is 18
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