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Highest Common Factor And Least Common Multiple MCQ Set 7

Showing question 31 to 35 of total 54 MCQs

MCQ Set: 7

Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.

Question No: 31

3 birds fly along the circumference of a jungle. They complete one round in 27 minutes, 45 minutes and 63 minutes respectively. Since they start together, when will they meet again at the starting position?

  1. 945 minutes
  2. 126 minutes
  3. 135 minutes
  4. 9 hours

Question No: 32

What least possible 4-digit number, when divided by 12, 16, 18 and 20 leaves 21 as remainder?

  1. 36
  2. 133
  3. 144
  4. 1461

Question No: 33

5 clocks ring automatically at intervals of 12 minutes, 8 minutes, 3 minutes, 4 minutes and 10 minutes, respectively. In 8 hours from the moment they start, how many times will they ring together?

  1. 12 times
  2. 5 times
  3. 3 times
  4. 4 times

Question No: 34

What least number when divided by 36, 24 and 16 leaves 11 as remainder in each case?

  1. 36
  2. 133
  3. 144
  4. 155

Question No: 35

If (x - 4) is the HCF of x2 - 8x + 15 and x2 - kx +1 , then what is k?

  1. 8/15
  2. 4
  3. 5
  4. 15/8
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