What is the GCF of 16, 24, and 32?


Working out all the factors of 16, 24 and 32, you will find that 8 is the greatest one that all of them share.

Also, you cannot have a factor that is greater than half of the lowest number, so 8 is the greatest possible factor of 16. It is also the difference between all the numbers, so it is a good place to begin.