If p and q are two prime number, then what is their HCF?
It is given that p and q are two prime numbers; we have to find their HCF.
We know that the factors of any prime number are 1 and the prime number itself.
For example, let $p=2$ and $q=3$
Thus, the factors are as follows
$p=2 \times 1$
$q=3 \times 1$
Now, the HCF of 2 and 3 is 1.
Thus the HCF of p and q is 1