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8th Class Mathematics Factorisation Question Bank Factors & Multiples

  • question_answer
    A number N = 897324A64B is divided by both 8 and 9. Which of the following is the value of (A+B)?
    (i) 2                 (ii) 11 (iii) 9

    A)  Either (i) or (ii)

    B)  Either (ii) or (iii)

    C)  Either (i) or (ii) or (iii)                 

    D)  None of these

    Correct Answer: A

    Solution :

    N = 897324A64B For N divisible by 8, last three digits should be divisible by 8. For N divisible by 9, sum of digits should be divisible by 9. However, 64B is divisible by 8 when B equals 0 and 8. Now, if \[B=0,\]then A should be 2. And if \[B=8,\]then A should be 3. Then, \[(A+B)=2\]and 11.


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