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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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41. The wheels revolve round a common horizontal axis. They make 15, 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?

  • 2 min
  •  1 min
  • 3 min
  • None

42.  What is the least number which when divided by 8, 12, 18 and 24 leaves the remainders 4, 8, 14 and 20 respectively?

  • 78
  • 68
  •  58
  • None

43. Find the least number which when divided by 35 leaves remainder 25, when divided by 25 leaves remainder 15 and when divided by 15 leaves remainder 5?

  • 420
  • 515
  •  518
  • 435

44.  Find the greatest number of four digits which when divided by 10, 15, 21 and 28 leaves 4, 9, 15 and 22 as remainders respectively?

  • 9664
  • 9654
  • 9864
  • 9666

45.  A heap of stones can be made up into groups of 21. When made up into groups of 16, 20, 25 and 45 there are 3 stones left in each case. How many stones at least can there be in the heap?

  • 2403
  • 4803
  • 7203
  • 3603