4th Class Mathematics Factors and Multiples Question Bank Multiples and Factors

  • question_answer
    Direction: Factors of a number which are prime are called its prime factors. Factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18. Prime factors of 36 are: 2, 3. A number can be written as a product of its prime factors, e.g.\[36=2\times 2\times 3\times 3\]. A factorization in which every factor is prime is called prime factorization of the number. Two numbers are co-prime if they have only 1 as the common factor. Based on the information given above answer the following questions. Which one of the following shows the prime factorization of the number 48?

    A) \[48=4\times 4\times 3\]                     

    B) \[48=8\times 6\]

    C) \[48=2\times 2\times 2\times 2\times 3\]

    D) \[48=12\times 4\]

    Correct Answer: C

    Solution :

    \[48=2\times 2\times 2\times 2\times 3\]shows prime factorisation of 48 because every factor is prime.        


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