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    Mathematics
    Grade-4-
    Easy

    Question

    Find one of the following numbers is a prime number.

    1. 14    
    2. 15    
    3. 18    
    4. 19    

    hintHint:

    Verifying the given numbers are prime or not.
    Prime number :  prime number  is  a number which is only divisible by 1 and itself.

    The correct answer is: 19

      Step 1:
      14 has factors 1, 2, 7 and 14. It is composite.
      15 has factors 1, 3, 5, and 15. It is composite.
      18 has factors 1, 2, 3, 6, 9 and 18. It is composite.
      Step 2:
      Only 19 among the given numbers is a prime number as it is only divisible by 1 and itself.

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