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Question
Find the highest common factor of 27 and 36.
- 9
- 9
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Solution
The correct option is A 9
Factors of 27 = 1, 3, 9 and 27
Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18 and 36
∴ The common factors of 27 and 36 are 1, 3 and 9.
Since 9 is the greatest of the three, 9 is the HCF (Highest Common Factor) of 27 and 36.
Factors of 27 = 1, 3, 9 and 27
Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18 and 36
∴ The common factors of 27 and 36 are 1, 3 and 9.
Since 9 is the greatest of the three, 9 is the HCF (Highest Common Factor) of 27 and 36.
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