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Class 9 Mathematics Sequences and Progressions Sum of first n natural numbersMediumLevel 59

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For which (n) will (S_n=1081)?

Answer and explanation

Correct answer: (46)

(S_{46}=\frac{46\times47}{2}=1081), so (n=46). Checking with options is useful for larger sums.

Related tags

Math Sequences Natural-Numbers Sum

Frequently asked questions

What is the correct answer to this question?

(46)

Why is this the correct answer?

(S_{46}=\frac{46\times47}{2}=1081), so (n=46). Checking with options is useful for larger sums.

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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