Solve the following subquestion
Find the mean of the first 5 natural numbers.

Find the sum of the first n natural numbers.

Find the sum of the first 100 natural numbers.

Find the sum of the first 25 odd natural numbers.

Find the sum of the first 50 even natural numbers.

Find the sum of the first n odd natural numbers

Find the sum of the first n even natural numbers

Find the sum of the first 123 even natural numbers.

Choose the correct alternative answer for each of the following subquestions: What is the sum of the first 30 natural numbers?

Find the sum of first n even natural numbers.

Choose the correct atternative answer for each of the following question: What is the mean of the first ten odd natural numbers ?