HCF and LCM Aptitude Questions Practice Question and Answer

Q:

Two numbers are in the ratio 3: 4. If their LCM is 240, the E smaller of the two numbers is: 

1501 1

  • 1
    100
    Correct
    Wrong
  • 2
    80
    Correct
    Wrong
  • 3
    60
    Correct
    Wrong
  • 4
    50
    Correct
    Wrong
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Answer : 3. "60 "

Q:

What least number must be subtracted from 1936 so that the resulting number when divided by 9, 10 and 15 will leave in each case the same remainder 7? 

1489 0

  • 1
    39
    Correct
    Wrong
  • 2
    30
    Correct
    Wrong
  • 3
    37
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 1. "39 "

Q:

Four bells ring at the intervals of 5, 6, 8, and 9 seconds. All the bells ring simultaneously at the same time. They will again ring simultaneously after: 

1488 0

  • 1
    12 minutes
    Correct
    Wrong
  • 2
    18 minutes
    Correct
    Wrong
  • 3
    6 minutes
    Correct
    Wrong
  • 4
    24 minutes
    Correct
    Wrong
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Answer : 3. "6 minutes "

Q:

The HCF and LCM of two numbers are 44 and 264 respectively. If the first number is divided by 2, the quotient is 44. The other number is:

1481 0

  • 1
    147
    Correct
    Wrong
  • 2
    528
    Correct
    Wrong
  • 3
    132
    Correct
    Wrong
  • 4
    264
    Correct
    Wrong
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Answer : 3. "132 "

Q:

The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10 : 15 : 00 AM, then at what time will they again change simultaneously? 

1477 0

  • 1
    10:16:54 AM
    Correct
    Wrong
  • 2
    10:18:36 AM
    Correct
    Wrong
  • 3
    10:17:02 AM
    Correct
    Wrong
  • 4
    10:22:12 AM
    Correct
    Wrong
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Answer : 2. "10:18:36 AM"

Q:

The sum of the HCF and LCM of two numbers is 680 and the LCM is 84 times the HCF. If one of the numbers is 56, the other is : 

1448 0

  • 1
    84
    Correct
    Wrong
  • 2
    12
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    96
    Correct
    Wrong
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Answer : 4. "96"

Q:

The HCF of two numbers is 96 and their LCM is 1296. If one of the numbers is 864, the other is

1439 0

  • 1
    140
    Correct
    Wrong
  • 2
    144
    Correct
    Wrong
  • 3
    132
    Correct
    Wrong
  • 4
    135
    Correct
    Wrong
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Answer : 2. "144"

Q:

What is the HCF of 16, 72 and 28 ?

1438 0

  • 1
    3
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    1
    Correct
    Wrong
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Answer : 2. "4"

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