The factors of 3 are:
1, 3
The factors of 15 are:
1, 3, 5, 15
The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30
The factors of 150 are:
1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 150
The factors of 300 are:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 150, 300
The factors of 1500 are:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 125, 150, 250, 300, 375, 500, 750, 1500
The common factors are:
1, 3
The Greatest Common Factor (GCF) is:
3
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gcf(290, 390) = 10
Using prime factorisation:
290 = 2 x 5 x 29
390 = 2 x 3 x 5 x 13
hcf = 2 x 5 = 10
Since 26 is a factor of 390, it is automatically the GCF.
The GCF of 48 and 390 is 6.
Since 65 is a factor of 390, it is automatically the GCF of this problem.
The GCF is 15.
45 is the greatest common factor.