CBSE  /  Class 8  /  Maths  /  Algebraic Expressions and Identities

  • 1. 
    The area of a rectangle with length 2l²m and breadth 3lm² is

  • 6l³m³
  • l³m³
  • 2l³m³
  • 4l³m³

  • 2. 
    The volume of a cube of side 2a is

  • 4a²
  • 2a
  • 8a³
  • 8

  • 3. 
    The volume of a cuboid of dimensions a, b, c is

  • abc
  • a²b²c²
  • a³b³c³
  • none of these

  • 4. 
    (x - y)(x + y) + (y - z)(y + z) + (z - x) (z + x) is equal to

  • 0
  • x² + y² + z²
  • xy + yz + zx
  • x + y + z

  • 5. 
    (a + b)² is equal to

  • a² + b² - 2ab
  • a² + b² + 2ab
  • a² + b²
  • 2ab

  • 6. 
    (a - b)² is equal to

  • a² + b² - 2ab
  • a² + b² + 2ab
  • a² + b²
  • 2ab

  • 7. 
    a² - b² is equal to

  • 2ab
  • -2ab
  • (a + b) (a - b)
  • ab

  • 8. 
    An algebraic expression that contains only one term is called:

  • Monomial
  • Binomial
  • Trinomial
  • None of the above

  • 9. 
    5x + 6y is a:

  • A. Monomial
  • Binomial
  • Trinomial
  • None of the above

  • 10. 
    The algebraic expression 3x + 2y + 6 is

  • monomial
  • Binomial
  • Trinomial
  • None of the above
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