# NCERT Class 9 Mathematics Chapter 3 The World of Numbers Solutions: In-Text and Exercise Questions Explained | SwaVid

Here are the questions from NCERT Class 9 Mathematics textbook "Ganita Manjari", "The World of Numbers" (Chapter 3), along with their step-by-step solut...

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# The World of Numbers

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

## Related chapters

Chapter 3 · Class 9 Mathematics

Here are the questions from NCERT Class 9 Mathematics textbook "Ganita Manjari", "The World of Numbers" (Chapter 3), along with their step-by-step solutions. This chapter is part of the 2026-27 syllabus.

Your study route

Exercise Set 3.1

Answer: The merchant will leave with 90 copper ingots.

Exercise Set 3.2

Before you push ahead

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Source

- Understand the given exchange rate: For every 2 bags of spices, the merchant receives 15 copper ingots.
- Calculate the number of ingots received per bag of spices. Divide the number of ingots by the number of bags: 15 ingots / 2 bags = 7.5 ingots per bag.
- The merchant brings 12 bags of spices to the market.
- To find the total number of copper ingots, multiply the number of bags (12) by the ingots received per bag (7.5): 12 bags * 7.5 ingots/bag = 90 ingots.
- Alternatively, you can find how many sets of 2 bags are in 12 bags: 12 / 2 = 6 sets. Then multiply this by the ingots per set: 6 * 15 ingots = 90 ingots.
- NCERT Class 9 Mathematics textbook: Ganita Manjari : Chapter 3: The World of Numbers

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