To do this you first need to split the numbers up into their prime factors:
8 = 2x2x2
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:
2x2x2 = 8
Thus the HCF of 8 and 64 is 8.
8
The GCF is 8.
The GCF is 16.
The HCF is: 8
divide both by the highest factor (8 in this case) answer is 8 over 7
The GCF is 16.
The GCF is 16.
192
It is: 4
It is: 16
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.
No. The hcf of 51 and 64 is 1.