Yes, GCF means Greatest Common Factor
For example the GCF of 15 and 18 is 3 which is less than both 15 and 18.
No.
No.
No.
No.
The LCM is never less than the greatest number in the set. The LCM of 4 and 9 is 36.
No. The LCM of 4 and 6 is 12.
The LCM for any pair of natural numbers can be as big as their product.
How many numbers less than 700 are divisible by both 15 and 21?
I think so. -4 and -5 are both rational numbers. Their sum is -9, which is less than both of them individually.
They are both numbers less than 10
48 and 56
It need not be. The numbers 1/2 and (-1/2) are both fractions less than 1 but their quotient is -1, which is less than both the fractions.