2x2x2x3
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It is: 2*2*2*2*7 or as 24*7 =112
2x2x2x3 = 24
24 = 2 × 2 × 2 × 3
To work this out, you need to write the numbers as the product of their prime factors: 24 = 2x2x2x3 64 = 2x2x2x2x2x2 The next step is to identify any common prime factors. In this case both numbers have three 2s as prime factors. Multiply these together and you get: 2x2x2 = 8 Thus the HCF of 24 and 64 is 8.
The prime numbers from 12 to 24 are 13, 17, 19, and 23.