Divide by 2 and 3.
1,2,3,4,6,8,12,24
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The greatest factor of 24 is 24. The greatest factor of a number is the number itself.
I assume that's supposed to be a fraction, 24/72. The idea is to find a common factor - a number that is a factor of both 24 and 72. Then, divide both numbers by this factor. Repeat, until you find no more common factors.
You need at least two numbers to find a GCF.
To find the highest common factor of two numbers you first need to break them down into their prime factors. In this case: 24 = 2x2x2x3 28 = 2x2x7 The next step is to identify the common factors. In this case, both numbers have two 2s as a factor. We multiply these together to get the HCF: 2x2=4 Thus 4 is the highest common factor of 24 and 28.
A factor = a number which can be divided into the given number with no remainder so yes 48/24 = 2