2. Sample Papers
  3. Railways
  4. Quantitative Aptitude
  5. LCM & HCF

Railways Quantitative Aptitude LCM & HCF Sample Paper HCF and LCM Sample Test Paper-2

  • question_answer
    Three bells toll at intervals of 9, 12 and 15 minutest respectively. All the three begin to toll at 8 a.m. At what time will they toll together again?

    A)  8.45 a.m.        

    B)  10.30 a.m.

    C)  11.00 a.m.       

    D)  1.30 p.m.

    Correct Answer: C

    Solution :

    [c] Bells will toll together again at a time, which is obtained by taking L.C.M. of their individual tolling intervals. L.C.M. of 9, 12 and 15 = 180 min They will toll together again after 180 min, i.e. 3 hours. Time = 8 + 3 = 11 a.m.


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