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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMediumLevel 70
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A student writes (5) contact numbers on the first day and (7) more numbers each next day. How many numbers will he write on the (15)th day?

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Answer and explanation

Correct answer: (103)

The numbers form the AP (5,12,19,\ldots) and (a_{15}=103). Exam tip: work done on the (n)th day is the (n)th term.

Related tags

ApWord-ProblemContacts

Frequently asked questions

What is the correct answer to this question?

(103)

Why is this the correct answer?

The numbers form the AP (5,12,19,\ldots) and (a_{15}=103). Exam tip: work done on the (n)th day is the (n)th term.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Word problems based on APs.

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