True or False :
Sum of first n even natural numbers is equal to `n^2`.

The sum of first 30 natural numbers is:

Find the sum of first n natural numbers.

Find the sum of first 100 natural numbers.

If the sum of first n even natural numbers is equal to k times the sum of first n odd natural numbers, then k is equal to:

The arithmetic mean of first n odd natural numbers is :

Find the sum of first hundred even natural numbers divisible by 5.

The sum of the first n odd number is :

Examine whether the following statement is true or false: { x : x is an even natural number less than 6) sub { x : x is a natural number which divides 36}