Try to recall the concept of perfect numbers.

Take any number and then think about different times table in which it would come.

Recall first 10 prime and composite numbers.

Recall first 10 prime numbers.

Think about the number which when multiplied by itself should give one of the answers given below in the options.

Recall first 5 prime numbers and composite numbers

Think about the sum of the factors of 6.

Try dividing 36 by all the given options.

Think of the definition of prime numbers.