Find the HCF and LCM of 84 and 144 by prime factorisation method.
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Answer:
Greatest Common Factor
Take the prime factors that are common to both numbers.
Those are 3, 2 and 2.
Multiply these together: 3 x 2 x 2 = 12.
Therefore, the GCF of 84 and 144 is 12.
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