Playing with Nu...

A number other than one which is either divisible by $$1$$ or itself is called a

Which of the following numbers have most number of divisors?

Write three pairs of co-primes between $$15$$ and $$30.$$

The number of prime numbers between 0 and 20 is

Which of the following is a prime number?

Write all prime numbers between $$20$$ and $$50.$$

The two numbers which have only $$1$$ as their common factor are called as ____ .

The numbers which have more than two factors are called

A number is divisible by $$6$$, when it is divisible by both _____ .

A number which is a factor of every number is