HCF and LCM Aptitude Questions Practice Question and Answer

Q:

If the least common multiple(LCM) of two numbers is 231, the Highest common multiple(H.C.F)  of both numbers is 11 and the first number is 77, then the second number is

994 0

  • 1
    47
    Correct
    Wrong
  • 2
    37
    Correct
    Wrong
  • 3
    57
    Correct
    Wrong
  • 4
    33
    Correct
    Wrong
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Answer : 4. "33"

Q:

The least number, which is a perfect square and is divisible by each of the numbers 16, 20 and 24 is 

994 0

  • 1
    6400
    Correct
    Wrong
  • 2
    14400
    Correct
    Wrong
  • 3
    1600
    Correct
    Wrong
  • 4
    3600
    Correct
    Wrong
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Answer : 4. "3600 "

Q:

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

987 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:

Find the total number of Prime Factors of 720 ? 

982 0

  • 1
    5
    Correct
    Wrong
  • 2
    30
    Correct
    Wrong
  • 3
    7
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 3. "7 "

Q:

Three numbers which are co-prime to one another are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is: 

976 0

  • 1
    85
    Correct
    Wrong
  • 2
    89
    Correct
    Wrong
  • 3
    75
    Correct
    Wrong
  • 4
    81
    Correct
    Wrong
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Answer : 1. "85 "

Q:

Three Alarm make a beep after every 48 sec, 72 sec and 108 sec respectively. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest is

975 0

  • 1
    10:07:36 hrs
    Correct
    Wrong
  • 2
    10:07:24 hrs
    Correct
    Wrong
  • 3
    10:07:12 hrs
    Correct
    Wrong
  • 4
    10:07:48 hrs
    Correct
    Wrong
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Answer : 3. "10:07:12 hrs"

Q:

The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number.

971 0

  • 1
    107
    Correct
    Wrong
  • 2
    103
    Correct
    Wrong
  • 3
    105
    Correct
    Wrong
  • 4
    102
    Correct
    Wrong
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Answer : 3. "105"

Q:

If the product of two numbers is 4941 and their LCM is 81, then their HCF is:

954 0

  • 1
    59
    Correct
    Wrong
  • 2
    60
    Correct
    Wrong
  • 3
    35
    Correct
    Wrong
  • 4
    61
    Correct
    Wrong
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Answer : 4. "61"

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