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Mathematics for IGCSE & O level - Number (Section 2 - No. 17)
What is the HCF of 72 and 108?
6
12
36
72
Explication
The prime factorization of 72 = 2^3 * 3^2. The prime factorization of 108 = 2^2 * 3^3. HCF = 2^2 * 3^2 = 4 * 9 = 36.
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