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    Mathematics
    Grade-4-
    Easy

    Question

    Identify the prime number from the following numbers.

    1. 20    
    2. 30    
    3. 42    
    4. 23    

    hintHint:

    prime number is a number which has one and itself as factors

    The correct answer is: 23

      The only factors of 23 are 1 and 23. 
      23 is a prime number. 

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