" 1.What is the sum of first "n" natural numbers? "

What is the sum of first 20 natural numbers?

What is the sum of first 30 natural numbers?

What is the sum of first 10 natural numbers.

What is the sum of first n odd natural numbers ?

What is the sum of first n even natural numbers ?

What is the sum of the first 'n' natural numbers?

Choose the correct alternative from those given below each question: What is the sum of first n natural numbers?

Find the sum of first n natural numbers.

Find the sum of first n natural numbers.

Find the sum of first n natural numbers.