What is the sum of natural numbers from (1) to (35)?
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Answer and explanation
Correct answer: 630
The sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\). Here, \(n=35\), so \(\frac{35\times36}{2}=35\times18=630\). Therefore, the correct answer is 630. A value such as 610 may result from an error in calculation. Exam tip: for the sum from 1 to \(n\), use \(\frac{n(n+1)}{2}\).
Frequently asked questions
What is the correct answer to this question?
630
Why is this the correct answer?
The sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\). Here, \(n=35\), so \(\frac{35\times36}{2}=35\times18=630\). Therefore, the correct answer is 630. A value such as 610 may result from an error in calculation. Exam tip: for the sum from 1 to \(n\), use \(\frac{n(n+1)}{2}\).
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.
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