1 That's because 23 is a Prime number.
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The GCF is 4.
First, express each number in terms of its prime factors. 32 = 2 x 2 x 2 x 2 x 2 = 25 56 = 2 x 2 x 2 x 7 = 23 x 7 The highest factor that both numbers have in common is 23 = 8 THE HCF of 32 and 56 is 8.
The GCF is 2.
The GCF is 8.
To find the highest common factor of two numbers, you must first split them into their prime factors. In this case, the numbers 28 and 32 can split as follows: 28 = 2x2x7 32 = 2x2x2x2x2 The next step is to identify all common prime factors. In this case, the common prime factors are two 2s. To find the HCF, you just multiply these together: 2x2=4 Thus the highest common factor of 28 and 32 is 4.