Section A: Write Algebraic Expressions (1ā10)
1. Write an expression for:
(a) 6 more than a number
(b) 4 times a number
2. Write an expression for:
(a) 9 less than a number
(b) Twice a number increased by 5
3. Write an expression for the perimeter of a square whose side is x cm.
4. Write an expression for the perimeter of a rectangle whose length is l and breadth is b.
5. Write an expression for the cost of x notebooks at ā¹15 each.
6. Write an expression for the total cost of a pens at ā¹10 each and b pencils at ā¹5 each.
7. Write an expression for the age of Ramesh if he is 7 years older than Suresh whose age is x.
8. Write an expression for:
(a) Three times a number decreased by 2
(b) Two less than five times a number
9. Write an expression for the total number of students if there are x boys and y girls.
10. Write an expression for the total money in rupees if a person has x notes of ā¹50 and y notes of ā¹20.
Section B: Simplify the Expressions (11ā20)
11. Simplify:
a + a + a
12. Simplify:
5x + 3x ā x
13. Simplify:
7y ā 2y + 4
14. Simplify:
(3a + 5) ā a
15. Simplify:
2(x + 4)
16. Simplify:
4m ā (m + 3)
17. Simplify:
(5x + 2y) + (3x ā y)
18. Simplify:
10p ā 4p + 6
19. Simplify:
3(2a + 1)
20. Simplify:
(8x + 6) ā (3x + 2)
Section C: Value-Based & Pattern Questions (21ā30)
21. Find the value of 2x + 5 when x = 3.
22. Find the value of 4a ā 1 when a = 6.
23. If n = 10, find the value of 2n + 1.
24. If y = 5, find the value of 3y ā 2.
25. A matchstick pattern follows the rule 2n + 1.
Find the number of matchsticks when n = 8.
26. Write the formula for the number of matchsticks if each step adds 3 matchsticks, starting from 2.
27. The cost of one chair is ā¹x. Write an expression for the cost of 7 chairs.
28. Write the expression for the perimeter of an equilateral triangle of side a and find its value when a = 9 cm.
29. If the age of a father is 3 times the age of his son whose age is x, write the expression.
30. In a repeating pattern A, B, C, A, B, Cā¦
Which expression gives the position of the B design?
Tip for Students
If you can do these 30 questions confidently,
Chapter 4 is fully under control 