The common factors are: 1, 3
1 or 3 or 9
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71 that's as far up as it goes because 72 is a composite number not a prime number!
1 is the only common factor of 11 and 21.
21
1. The two numbers are coprime.
It is: 1
The number is 1.
Only the number one.
It is: 1
3 can go into both these numbers 72/3= 24 21/3= 7
7, 21, 8, 72, 9, ?
The HCF is 4
1 and 3.
1 or 3 or 9
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71 that's as far up as it goes because 72 is a composite number not a prime number!
The number that goes into both 12 and 72 equally is 12. This is because 72 divided by 12 equals 6, so 12 is a common divisor of both numbers.
Nothing.. Because 21 is a Prime number