CBSE Class 8 Maths Fractions in Disguise (Class 8 NCERT New) Quiz 10

1. At 10% interest per annum compounded annually, a deposit of ₹6000 grows for 3 years with interest added back each year. What total amount is received at the end of 3 years?

A ₹7920 B ₹7960 C ₹7986 D ₹8100

2. Bank of Wahapur offers an interest of 5% per annum. For a deposit of ₹20,000 for 4 years, which pair of totals is correct when compounding is not done annually versus when compounding is done annually?

A ₹24,000 without compounding; ₹24,310.13 with compounding B ₹24,000 without compounding; ₹24,200 with compounding C ₹24,500 without compounding; ₹24,000 with compounding D ₹24,310.13 without compounding; ₹24,000 with compounding

3. Do you observe anything interesting in the solutions of the two questions above? Which statement best explains the difference between compounding and not compounding at a fixed annual rate?

A With compounding, interest each year grows because interest is earned on previous interest; without compounding, the interest earned each year stays the same B Both give exactly the same interest every year and the totals are equal C Without compounding, interest grows faster than with compounding because the principal increases every year D Compounding and not compounding both decrease the interest earned over time

4. The population of Bengaluru in 2025 is about 250% of its population in 2000. If the population in 2000 was 50 lakhs, what is the population in 2025?

A 50 lakhs B 100 lakhs C 125 lakhs D 150 lakhs

5. The population of the world in 2025 is about 8.2 billion. Germany has a population of 83 million. What is Germany’s approximate percentage share of the world population?

A 1% B 2% C 4% D 8%

6. The population of the world in 2025 is about 8.2 billion. India has a population of 1.46 billion. What is India’s approximate percentage share of the world population?

A 10% B 13% C 18% D 35%

7. The population of the world in 2025 is about 8.2 billion. Bangladesh has a population of 175 million. What is Bangladesh’s approximate percentage share of the world population?

A 0.1% B 1% C 2% D 10%

8. The population of the world in 2025 is about 8.2 billion. The USA has a population of 347 million. What is USA’s approximate percentage share of the world population?

A 2% B 4% C 8% D 13%

9. A shopkeeper initially set the price of a product with a 35% profit margin. Due to poor sales, he decided to offer a 30% discount on the selling price. Will he make a profit or a loss?

A Profit of 4.5% B Loss of 5.5% C No profit, no loss D Profit of 5.5%

10. What percentage of the area of the square is occupied by the region marked ‘E’ in the given figure?

A 2% B 4% C 5% D 8%