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Subjects
Class 9MathematicsSequences and ProgressionsSum of first n natural numbersHardLevel 62
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What will be the value of (S_{120}-S_{110})?

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Answer and explanation

Correct answer: (1155)

(S_{120}-S_{110}=111+112+\cdots+120=1155). The difference of nearby sums gives the sum of terms in between.

Related tags

MathSequencesNatural-NumbersSum

Frequently asked questions

What is the correct answer to this question?

(1155)

Why is this the correct answer?

(S_{120}-S_{110}=111+112+\cdots+120=1155). The difference of nearby sums gives the sum of terms in between.

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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  4. 4If a = 7 and d = 3, what is the sum of the first 6 terms?
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  6. 6What is the sum of the first (10) natural numbers?
  7. 7Find the sum of the first (20) natural numbers.
  8. 8If \(S_n=\frac{n(n+1)}{2}\), what is \(S_{15}\)?
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