The HCF of the given numbers is 1
Nothing.. Because 21 is a Prime number
(21/x) (12/100)= 175
The number is 1.
It is the number 1
21 is composite number because it has more than one number that goes into it
No even number gose in 21. In fact there is none that goes in 21, either.
3 is a prime factor of 12 and of 21.
The number is 1.
1
7
It is: 1