The greatest common multiples of any numbers is infinity.
If you meant LEAST common multiple:
75 = 3x5x5
90 = 2x3x3x5
52 = 2x2x13
25 = 2x13
The least common multiple is therefore:
2x2x3x3x5x5x13 = 11,700
If you meant greatest common factor ... the answer would be 1
Multiples of 26 include 26, 52, 78 and 104. For them to be common, they need to be compared to another set of multiples.
The LCM is 26.
Multiples of 13 include 13, 26, 39 and so on. For them to be common, they need to be compared to another set of multiples.
The LCM is 156.
There is an infinite number of common multiples for 26 and 24. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). However, the least or lowest common multiple of 26 and 24 is 312.
624.
Any multiple of 234.
Any multiple of 416.
26 = 26, 52, 78 52 = 52, 104, 156
Multiples of 26 include 26, 52, 78, 104, 130 and so on. You need at least two numbers to find a GCF.
Since 26 is a multiple of 2, it is automatically the LCM of this problem.
1066, 2132, 3198