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Class 10MathematicsArithmetic Progressions (AP)Finding the sum of the first (n) terms of an APEasyLevel 69
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In a shop, packets are arranged in the numbers (7,14,21,\ldots). How many packets will there be in the first (9) shelves?

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Answer and explanation

Correct answer: (315)

This is the sum of the first (9) multiples of (7), so (7\times45=315). Treat the number of shelves as the number of terms.

Related tags

Word ProblemPacketsAp Sum

Frequently asked questions

What is the correct answer to this question?

(315)

Why is this the correct answer?

This is the sum of the first (9) multiples of (7), so (7\times45=315). Treat the number of shelves as the number of terms.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Finding the sum of the first (n) terms of an AP.

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10 more MCQs
  1. 1If an arithmetic progression has first term \(a\), common difference \(d\), and \(n\) terms, which formula correctly represents the sum of its first \(n\) terms?
  2. 2Find the sum of the first (15) terms of the AP (4,8,12,\ldots).
  3. 3Which formula correctly represents the sum of the first \(n\) terms of an AP with first term \(a\) and common difference \(d\)?
  4. 4What is the sum of the first (25) terms of the AP (1,3,5,\ldots)?
  5. 5What is the sum of the first (12) terms of the AP (10,20,30,\ldots)?
  6. 6What will be the sum of the first (10) terms of the AP (7,14,21,\ldots)?
  7. 7If the first term of an AP is (5), the last term is (45), and the number of terms is (9), what is the sum?
  8. 8Find the sum of the first (30) terms of the AP (3,6,9,\ldots).
  9. 9What is the sum of the first (8) terms of the AP (20,18,16,\ldots)?
  10. 10If the AP is (9,13,17,\ldots), what is the sum of the first (11) terms?
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