CBSE  /  Class 8  /  Maths  /  Algebraic Expressions and Identities

  • 1. 
    The expression x + 3 is in

  • one variable
  • two variables
  • no variable
  • none of these.

  • 2. 
    The expression 4xy + 7 is in

  • one variable
  • two variables
  • no variable
  • none of these.

  • 3. 
    The expression x + y + z is in

  • one variable
  • no variable
  • three variables
  • two variables.

  • 4. 
    The value of 5x when x = 5 is

  • 5
  • 10
  • 25
  • -5.

  • 5. 
    The value of x² - 2x + 1 when x = 1 is

  • 1
  • 2
  • -2
  • 0.

  • 6. 
    The value of x² + y² when x = 1, y = 2 is

  • 1
  • 2
  • 4
  • 5.

  • 7. 
    The value of x² - 2yx + y² when x = 1, y = 2 is

  • 1
  • -1
  • 2
  • -2.

  • 8. 
    The value of x² - xy + y² when x = 0, y = 1 is

  • 0
  • -1
  • 1
  • none of these.

  • 9. 
    Which of the following is a monomial?

  • 4x²
  • a + 6
  • a + 6 + c
  • a + b + c + d.

  • 10. 
    Which of the following is a binomial?

  • 3xy
  • 4l + 5m
  • 2x + 3y - 5
  • 4a - 7ab + 3b + 12.
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