CBSE  /  Class 6  /  Maths  /  Playing with Numbers

  • 1. 
    The greatest common factor of 8 and 20 is

  • 2
  • 1
  • 4
  • 8

  • 2. 
    The common factor of 9 and 15 is

  • 3
  • 6
  • 9
  • 15

  • 3. 
    The common factor of 4 and 15 is

  • 1
  • 2
  • 3
  • 5

  • 4. 
    Which of the following pairs of number are not co-prime?

  • 7,15
  • 12,49
  • 18,23
  • 12,21

  • 5. 
    Which of the following pairs of number are co-prime?

  • 30,415
  • 17, 68
  • 16, 81
  • 15, 100

  • 6. 
    The greatest common factor of 4, 8 and 12 is

  • 2
  • 1
  • 4
  • 8

  • 7. 
    The greatest common factor of 5, 15 and 25 is

  • 1
  • 5
  • 10
  • 15

  • 8. 
    The common factor of 3, 4 and 9 is

  • 1
  • 3
  • 4
  • 2

  • 9. 
    The greatest common factor of 75,60 and 210 is

  • 1
  • 3
  • 5
  • 15

  • 10. 
    The smallest common factor of 4, 12 and 16 is

  • 1
  • 2
  • 4
  • 8
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