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  5. Number System and its Operations

5th Class Mathematics Number System and its Operations Question Bank Number System

  • question_answer
    Janice and Jasmine were each given a piece of ribbon of equal length. Janice cuts her ribbons into equal lengths of 2m, while Jasmine cuts her ribbons into equal lengths of 5m. If there was no remainder in both cases, find the shortest possible length of ribbon given to them.

    A) 10     

    B) 2              

    C) 5                                 

    D) 100

    Correct Answer: A

    Solution :

    The shortest possible length of ribbon can be calculated by measuring the lowest common multiple (LCM) of the lengths of ribbon cut by Janice and Jasmine. Since 2 and 5 are both prime numbers, so to find their LCM, we will multiply them to get the shortest length of ribbon\[=2\times 5=10\].                          


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