The greatest common multiple of 10 and 18 is infinite.However, I suspect you want either:the greatest common factor of 10 and 18 which is the largest number which divides both 10 and 18 and is 2; orthe lowest common multiple of 10 and 18 which is smallest number into which both 10 and 18 divide (ie the smallest number which is a multiple of both 10 and 18) and is 90
60
10 is both a factor and a multiple of itself.
It is 90.
60
2520
The greatest common multiple of 10 and 18 is infinite.However, I suspect you want either:the greatest common factor of 10 and 18 which is the largest number which divides both 10 and 18 and is 2; orthe lowest common multiple of 10 and 18 which is smallest number into which both 10 and 18 divide (ie the smallest number which is a multiple of both 10 and 18) and is 90
60
10 is both a factor and a multiple of itself.
10
It is 90.
The least common factor - the smallest number which divides them all - is 1.
60
10. (10*1=10, 5*2=10)
Five is prime and a factor of both numbers.
1 and 5
The GCF means it's a factor of both numbers. 10 is not a factor of 57.