What you can do is see what the numbers can be divisible by. Sooo... what can go into 33, 55, and 132? Just to let you know it is to be the GREATEST common factor. For example 4 and 8. You can't use 2. It's not the greatest. You would use 4 because 4 is the greatest and can co into 8 and 4 evenly.
The GCF is 11. 11×3=33 5×11=55 12×11=132
The greatest common factor (GCF) of 33, 55, and 132 is 11. This is determined by finding the prime factorization of each number and identifying their common factors. 11 is the only common factor among them.
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