PSEB CLASS 8 MATH QUESTION PAPER 2024 ANSWER KEY
Answer key
(i) Which of the following is the associative property for addition?
(c)( x + y) + z = x+ (y + z)
(ii) Which of the following numbers does not have a multiplicative inverse?
(a) 0
(iii) If 2x - 3 = x + 2 then x = _
(c) 5
(iv) If 6x and 24 are two opposite sides of a parallelogram, what is the value of x?
(d) 4
(v) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 = _
(d) 8^2
(vi) What will be the ones place digit of √625
(b) 5
(vii) By what number must 108 be multiplied to make it a perfect cube?
(d) 2
(viii) ATM stands for
(a) Automated Teller Machine
ix) Identify the binomial
( b) 5x+2
(x) If the edge of a cube is doubled, then what will happen to the surface area?
(b) 4 times
(xi) Find the area of the rhombus whose diagonals are 4 cm and 6 cm.
(a) 12 cm²
(xii) Value of (5³ )⁴ is
(b) 5¹²
(xiii) Usual form of number 1.6×10⁴ is
(a) 16000
(xiv) What is the common factor of 10xy and 12y?
(c) 2y
(xv) The abscissa of (2,7) is:
(b) 2
(xvi) (a + b)² - (a - b)² =
(d) 4ab
Fill in the blanks
- **(i) The diagonals of a square bisect each other at an angle of 90°
- **(ii) Sum of all central angles in a pie chart is 360°
- (iii) The square of an odd number is always an odd number.
- (iv) If a perfect cube ends with digit 2, then the ones digit of its cube root will be 8
- (v) The number of tax slabs in G.S.T. are Four
- (vi) aᵐ + a ⁿ = aᵐ+ⁿ
- (vii) The horizontal line in the Cartesian plane is known as the X-axis
True/False
- (i) 2x+3=5y- 2 is a linear equation. False
- (ii) The diagonals of a rectangle are equal in length. True
- (iii) When a coin is tossed then the number of possible outcomes are 6.
- False There are only two possible outcomes, heads or tails.
- (iv) Multiplying a monomial with a binomial will give you a trinomial. False
- (v) Area of a rhombus = product of diagonals. False
- (vi) Two quantities are said to be in direct proportion when increase in one quantity leads to increase in other quantity. True
- (vii) (a - b)²= a²-b² + 2ab False