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\ 12-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

4. Subtract the following numbers in column form:
a. 9647 from 10456 b. 53264 from 87046

c. 82070 from 95062 d. 13295 from 67326
5. There are 35983 men, 22847 women and 6085 children in an area. What is the
population of that area?

6. In a certain year, three sugar factories produced 39847; 23078 and 12607 bags of sugar
respectively. How many bags of sugar were produced by these factories together?

7. In an election, there were four candidates. They received 38457; 25967; 9638 and
875 votes respectively. If 3257 votes were found invalid, how many votes in all were
counted?
8. The cost of a washing machine is `28,975, and the cost of a computer is `7,672 more
than the cost of the washing machine. What is the cost of the computer? What is the

total cost of the washing machine and the computer?
9. What number should be added to 17855 to get 40099?

10. What number should be subtracted from 42060 to get 7699?
11. The sum of two numbers is 90613. If one of the numbers is 58734, find the other
number.

12. A milk dairy produced 80500 litres of milk in a day. It supplied 38780 litres to one
town and 18697 litres to another town. How much milk was left with the dairy on that
day?

Mental Maths

Choose the correct option. 21 st
Century #Computational Thinking
Skills
1. 5000 + 8 + 18 = ?
a. 5036 b. 5016 c. 5026 d. 5046

2. 6567 + 9845 + 372 = ?
a. 17784 b. 16784 c. 15784 d. 16794

3. 8 ten thousands + 5 thousands + 15 hundreds + 12 tens = ?
a. 86620 b. 86520 c. 76520 d. 86720

4. The difference of 8095 and 3002 is:

a. 5003 b. 5093 c. 4093 d. 6093
5. Radhika's monthly income is `59,089 and Mohan's monthly income is `75,830. What

is the difference of their monthly incomes?
a. `11,985 b. `16,741 c. `83,259 d. `23,279

40 Mathematics 4