The GCF is 26.
13. 13 x 2 = 26 13 x 3 = 39 13 x 4 = 52
The first 4 multiples of 13 are: 13, 26, 39, and 52.
The Greatest Common Factor of 26, 39, 52: 13
13, 26, 39, 52, 65
Least common multiple of 26 and 39 and 52 is 156.
There can be no greatest common denominator. Suppose x is the greatest common denominator. That requires that 39 divides x, 26 divides x and x is the greatest such number. But 39 will divide 2x and 26 will divide 2x and 2x is greater than x. So x could not have been a GCD.
39 is the number halfway between 26 and 52.
156
156
The LCM of 13, 26, and 39 is 78.Multiples of 13 are 13, 26, 39, 52, 65, 78, and so on.Multiples of 26 are 26, 52, 78, and so on.Multiples of 39 are 39, 78, and so on.So 78 is the LCM of 13, 26, and 39.
Factors of 39: 1, 3, 13, 39.Factors of 52: 1, 2, 4, 13, 26, 52.Factors of 78: 1, 2, 3, 6, 13, 26, 39, 78.GCF (39, 52, 78) = 13