What is the sum of the first (1) natural number?
Answer and explanation
Correct answer: 1
The first natural number is 1. Therefore, the sum of the first 1 natural number is simply 1. Using \(\frac{n(n+1)}{2}\) with \(n=1\), we get \(\frac{1\times2}{2}=1\). Option A is not correct because 0 is not included here as the first natural number. Exam tip: “First \(n\)” means the sum of numbers from 1 to \(n\).
Frequently asked questions
What is the correct answer to this question?
1
Why is this the correct answer?
The first natural number is 1. Therefore, the sum of the first 1 natural number is simply 1. Using \(\frac{n(n+1)}{2}\) with \(n=1\), we get \(\frac{1\times2}{2}=1\). Option A is not correct because 0 is not included here as the first natural number. Exam tip: “First \(n\)” means the sum of numbers from 1 to \(n\).
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
