---
type: "Chapter"
knowledge_type: "chapter"
entity_type: "chapter"
id: "69be7b651b1028d43da5a672"
title: "Large Numbers Around Us"
board: "CBSE"
curriculum: "CBSE"
class: "Class 7"
subject: "Mathematics"
book: "Ganita Prakash"
chapter: "Large Numbers Around Us"
chapter_slug: "large-numbers-around-us"
canonical_url: "https://www.edzy.ai/cbse-class-7-mathematics-ganita-prakash-large-numbers-around-us"
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source: "Edzy"
version: 1
last_updated: "2026-06-20"
---

# Large Numbers Around Us
This chapter introduces the concept of large numbers, specifically focusing on the term 'lakh'. It involves a narrative about a farmer, Eshwarappa, who learns about the rich varieties of rice available in India, stimulating a discussion with his children about the concept of one lakh.

---

## Knowledge Snapshot

| Field | Details |
| :--- | :--- |
| Class | Class 7 |
| Subject | Mathematics |
| Book | Ganita Prakash |
| Chapter | Large Numbers Around Us |
| Pages | 1-23 |

---

## Chapter Summary

### Short Summary
The chapter discusses the large number 'lakh' through the conversation of Eshwarappa, a farmer, and his family regarding rice varieties, illustrating how large numbers can be conceptualized in daily life.

### Detailed Summary
Eshwarappa overhears a conversation about the decline in the varieties of rice in India, learning that formerly there were about a lakh varieties. His children, Roxie and Estu, ponder how long it would take to taste all these rice varieties if they tried one each day and discover that even eating multiple varieties daily would not suffice to taste them all within a lifetime.

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## Topic-Wise Explanation

### A Lakh Varieties!
The narrative begins with Eshwarappa, who learns from Ramanna and Lakshmamma about the significant decline in rice varieties, stressing the importance of indigenous seeds and the concept of one lakh.

### Land of Tens
*Note: Omitted as content not provided.*

### Of Crores and Crores!
*Note: Omitted as content not provided.*

### Exact and Approximate Values
*Note: Omitted as content not provided.*

### Patterns in Products
*Note: Omitted as content not provided.*

### Did You Ever Wonder...?
This section likely promotes curiosity about numbers and their applications in real life. *Note: Omitted as content not provided.*

---

## Core Ideas

| Idea | Explanation |
| :--- | :--- |
| Concept of Lakh | The chapter introduces the quantity of one lakh (100,000) and its relevance in daily choices, such as food variety. |

---

## Key Concepts

| Concept | Meaning |
| :--- | :--- |
| Lakh | A unit in the number system equal to 100,000. |

---

## Important Points for Revision
* Eshwarappa's encounter reveals the reduction of rice varieties in India.
* One lakh is illustrated as a significant number, asking readers to consider its scale.
* Eshwarappa's children question the feasibility of tasting all varieties of rice.
* Observations on the transition from traditional seed preservation to market reliance are noted.
* The calculations reflect on the number of days versus lifetime years and their implications.

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## Practice Questions

### Short Answer Questions
1. What did Ramanna and Lakshmamma discuss?
2. How many varieties of rice did Eshwarappa's children consider they could taste?
3. What is one lakh equal to in numbers?
4. How many days are in a year?
5. Why did Eshwarappa visit the market?

### Long Answer Questions
1. Explain the significance of one lakh in the context of rice varieties as discussed in the chapter.
2. Discuss the impact of modern agricultural practices on the preservation of rice varieties.
3. Calculate how many rice varieties can be tasted in 100 years if one eats two varieties daily.

---

## Source Attribution

| Field | Value |
| :--- | :--- |
| Source | Edzy |
| Reference Type | examSubjectBookChapter |
| Reference ID | 69be7b651b1028d43da5a672 |
| Canonical URL | https://www.edzy.ai/cbse-class-7-mathematics-ganita-prakash-large-numbers-around-us |
| Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-7-mathematics-ganita-prakash-large-numbers-around-us.md |