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    Mathematics
    Grade-4-
    Easy

    Question

    __________ following numbers is NOT a prime number.

    1. 41    
    2. 43    
    3. 47    
    4. 49    

    hintHint:

    Verifying the given numbers is not a prime no.
    Prime number :  prime number  is  a number which is only divisible by 1 and itself.

    The correct answer is: 49

      Step 1:
      41 has factors 1 and 41. It is prime.
      43 has factors 1 and 43. It is prime.
      47 has factors 1 and 47. It is prime.
      Step 2:
      Only 49 is NOT a prime number as it has three factors like 1, 7 and 49.

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