A number which has only two factors is called a (Multiples, prime numbers, composite numbers)

The smallest composite number is _____.

The $\mathrm{HCF}$ of two consecutive odd numbers is _____.

The prime triplet is _____.

The greatest five digit number exactly divisible by $9$ and $13$ is

From the numbers $2, 3, 4, 5, 6, 7, 8, 9$ how many pairs of co-primes can be formed?

If the number $2345a60b$ is exactly divisible by $3$ and $5$, then the maximum value of $a+b$ is

The $\mathrm{HCF}$ of $100$ and $101$ is ______.

The $\mathrm{LCM}$of $100$ and $101$ is