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Problems on L.C.M and H.C.F in Aptitude MCQ Quiz (Multiple Choice Questions And Answers)

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21. The smallest number when increased by " 1 " is exactly divisible by 12, 18, 24, 32 and 40 is:

  • 1440
  • 1449
  • 1439
  •  1459

22. A heap of coconuts is divided into groups of 2, 3 and 5 and each time one coconut is left over. The least number of Coconuts in the heap is?

  • 61
  • 41
  •  51
  • 31

23. The smallest number which when divided by 20, 25, 35 and 40 leaves a remainder of  14, 19, 29 and 34 respectively is?

  • 1496
  •  1994
  •  1494
  • 1349

24.  Find the least number of five digits which is exactly divisible by 12, 15 and 18?

  • 10025
  • 1080
  • 11080
  • 10080

25. Five bells first begin to toll together and then at intervals of 5, 10, 15, 20 and 25 seconds respectively. After what interval of time will they toll again together?

  • None
  •  5.5 min
  • 5.2 min
  • 5 min