Multiple Choice Questions on Six bells commence tolling together and toll at intervals of 2 4 6 8 10 and 12 seconds respectively ........... for MPPCS Exam Preparation

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Multiple Choice Questions

Six bells commence tolling together and toll at intervals of 2 4 6 8 10 and 12 seconds respectively ...........

Quantitative Aptitude (MPPCS) LCM, HCF
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    Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

    4

    Incorrect Answer

    10

    Incorrect Answer

    15

    Incorrect Answer

    16

    Correct Answer
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    Explanation:

    L.C.M. of 2, 4, 6, 8, 10, 12 is 120.

    So, the bells will toll together after every 120 seconds(2 minutes).

    In 30 minutes, they will toll together 30/2 + 1 = 16 times

    Hence, option 4 is the correct answer.

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