Yes, the prime factorization of 40 is 2 x 2 x 2 x 5
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40 = 2^3*5.
25=5x5 40=2x2x2x5 5 is the common factor
TO work out the HCF you need to split the numbers into their prime factors. In this case you have: 40 = 2x2x2x5 48 = 2x2x2x2x3 The next step is to identify any common prime factors. Both numbers have three 2s as prime factors. Multiply these together and you get: 2x2x2 = 8 Thus the HCF of 40 and 48 is 8.
40 = 23 x 51 60 = 22 x 31 x 51
Prime factorization of 90 = 2x3x3x5