Learn to earn knowledge: September 2022

Thursday, September 15, 2022

Subject: Mathematics Board: ICSE Grade: 8

Topic: Rational numbers

Q1. Add the following (9)

Q2. Evaluate

Q3. Write the additive inverse of:

Q4. Evaluate

Q5. Subtract

Q6. The sum of two rational numbers is 9/20. If one of them is 2/5, find the other.

Q7. Which rational number should be added to −7/8 to get 5/9?

Q8. Evaluate:

Q9. Write the multiplicative inverse of each rational number, given below :

Q10. Evaluate

Q11. The product of two rational numbers is -2. If one of them is 4/7, find the other.

Q12. If 3 and 1/2 litres of milk costs ₹49, find the cost of one litre of milk?
Q13.

Topic: Corrosion Grade:6

Name: ………………………………………. …… Board: IGCSE/ICSE

Objectives: To acquire the knowledge of

a. Corrosion

b. Name of the Metals that corrodes

c. Name of the technique that prevents corrosion.

d. Name of the monuments that are affected by corrosion.

1. What is corrosion?

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

2. Name two metals that corrode.

………………………………………………………………………………………………………………………………………………………………………………………………............................

3. List the name of the process by which corrosion can be prevented.

4. Corrosion has affected monuments too, write the names of the monuments.

5. How does the corrosion impact us?