# NCERT Class 6 Mathematics Chapter 5 Prime Time Solutions: In-Text and Exercise Questions Explained | SwaVid

This document provides real questions from the NCERT Class 6 Mathematics textbook, Chapter 5, titled "Prime Time" (Ganit Prakash edition), along with st...

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# Prime Time

## Find the gaps before this chapter finds them for you.

## Related chapters

Chapter 5 · Class 6 Mathematics

This document provides real questions from the NCERT Class 6 Mathematics textbook, Chapter 5, titled "Prime Time" (Ganit Prakash edition), along with step-by-step worked solutions. The questions include both in-text activities and end-of-chapter exercises, transcribed as closely as possible to their original wording.

Your study route

In-text Questions

Answer: The 'idli-vada' is said for the 10th time at the number 150.

Exercise Questions

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Source

- The game involves saying 'idli' for multiples of 3 and 'vada' for multiples of 5.
- When a number is a multiple of both 3 and 5, 'idli-vada' is said.
- Numbers that are multiples of both 3 and 5 are common multiples of 3 and 5.
- The least common multiple (LCM) of 3 and 5 is 15.
- So, 'idli-vada' is said for multiples of 15.
- To find the 10th time 'idli-vada' is said, we need to find the 10th multiple of 15.
- 10th multiple of 15 = 10 × 15 = 150.
- NCERT Class 6 Mathematics textbook: Mathematics : Chapter 5: Prime Time

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