18, 36, and 54
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∙ 11y ago3 and 18
18, 36, 54
No. 6 is not a factor of 15. The greatest common factor of 15 and 18 is 3.
The GCF is 9.
You need at least two numbers to find a GCF. The GCF of 18 and 24 is 6.
3 and 18
9 and 6 have an LCM of 18 and a GCF of 3.
18, 36, 54
No. 6 is not a factor of 15. The greatest common factor of 15 and 18 is 3.
The GCF of these numbers is 18. This leaves you with 2, 6 and 3 respectively. There is no further common factor.
9, 18 and 27
The GCF of the given numbers is 3
The GCF of 3, 12, and 18 is 3
15 and 18
The GCF is 9.
The GCF of 9, 18, and 42 is 3.The factors of 9 = 3*3The factors of 18 = 2*3*3The factors of 42 = 2*3*7So the greatest common factor = 3.
The GCF of 18 and 21 is 3.The prime factorization of 18 is 2*3*3The prime factorization of 21 is 3*7So the GCF of 18 and 21 is 3.You can also notice that the difference between 21 and 18 is 3. The GCF can be no larger than the difference between the numbers. Since 3 is a factor of both 18 and 21, it is the GCF.The GCF is 3.3