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Important Questions Maths Chapter 1 Class 7 Ganit Prakash

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Imp Questions For All Chapters – Ganit Prakash Class 7th

Large Numbers Around Us


1. What is the smallest 6-digit number?

Answer: 1,00,000 (One lakh)

2. How many varieties of rice were there in the past, as per the chapter?

Answer: About one lakh varieties.

3. If a person eats 2 varieties of rice a day, how many varieties will they eat in 100 years?

Answer: 2 × 365 × 100 = 73,000 varieties (less than 1 lakh)

4. How much less is 75,000 than 1 lakh?

Answer: 1,00,000 − 75,000 = 25,000

5. How do we write 12,78,830 in words?

Answer: Twelve lakh seventy-eight thousand eight hundred thirty.

6. What is the value of: One lakh twenty-three thousand four hundred fifty-six?

Answer: 1,23,456

7. How many zeroes are there in 1 crore?

Answer: 7 zeroes → 1,00,00,000

8. What is 1 billion called in the Indian system?

Answer: 1 arab or 100 crore

9. How many thousands are there in 1 lakh?

Answer: 1000 × 100 = 1,00,000 → So, 1000s in 1 lakh = 100

10. Estimate: 4,63,128 + 4,19,682 is near which lakh?

Answer: It is near 8,83,000. Closer estimate: less than 9,00,000

11. Is 1 lakh a big number or small?

Answer: It depends. For example, 1 lakh people can fill a stadium, but also 1 lakh hairs can fit on a person’s head. So, context matters.

12. What is the shortcut to multiply 824 × 25?

Answer: 824 × 25 = (824 × 100) ÷ 4 = 82,400 ÷ 4 = 20,600

13. Write 70,53,138 in words.

Answer: Seventy lakh fifty-three thousand one hundred thirty-eight.

14. What is 125 × 40 × 8 × 25?

Answer: 125 × 8 = 1000, so: 1000 × 40 × 25 = 10,00,000

15. What is the distance from Earth to the Sun (approx.)?

Answer: 2100 × 70,000 = 1,47,00,000 km (147 million km approx.)

16. How many coins, 1 mm thick, are needed to match the Statue of Unity (180 m)?

Answer: 180 m = 180,000 mm → So, 180,000 coins needed.

17. What is the meaning of ‘rounding up’?

Answer: Approximating a number to a higher value. E.g., 732 sweets rounded up to 750.

18. What is the approximate population increase of Pune from 2001 to 2011?

Answer: 31,15,431 − 25,38,473 ≈ 5,76,958

19. How many years will it take to travel 3,84,400 km (Earth to Moon) at 100 km/day?

Answer: 3,84,400 ÷ 100 = 3,844 days ≈ 10.5 years

20. How many babies are born worldwide in a day if 250 are born every minute?

Answer: 250 × 60 × 24 = 3,60,000 babies per day

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    July 27, 2025 at 5:38 pm

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