HCF and LCM Aptitude Questions Practice Question and Answer

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

1441 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:

What is the Highest Factor of $$ {2^{3}×{3^{5}}} and \ {2^{3}×{3^{5}}}$$ ?

1425 0

  • 1
    $$ {2^{3}×{3^{5}×{5^{2}}}}$$
    Correct
    Wrong
  • 2
    $$ {3^{3}} $$
    Correct
    Wrong
  • 3
    $$ {2^{1}×{3^{3}×{5^{1}}}}$$
    Correct
    Wrong
  • 4
    $$ {{3^{5}×{5^{2}}}}$$
    Correct
    Wrong
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Answer : 2. "$$ {3^{3}} $$"

Q:

A number which when divided by 10 leaves remainder of 9, when divided by 9 leaves a remainder of 8, and when divided by 8 leaves a remainder of 7, is: 

1419 0

  • 1
    359
    Correct
    Wrong
  • 2
    1359
    Correct
    Wrong
  • 3
    1539
    Correct
    Wrong
  • 4
    539
    Correct
    Wrong
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Answer : 1. "359 "

Q:

The least number which when divided by 4, 6, 8 and 9 leave zero remainders in each case and when divided by 13 leaves a remainder of 7 is: 

1417 0

  • 1
    85
    Correct
    Wrong
  • 2
    36
    Correct
    Wrong
  • 3
    144
    Correct
    Wrong
  • 4
    72
    Correct
    Wrong
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Answer : 4. "72 "

Q:

The product of two number is 4107. If the HCF of the number is 37. The greatest number is

1417 0

  • 1
    185
    Correct
    Wrong
  • 2
    111
    Correct
    Wrong
  • 3
    107
    Correct
    Wrong
  • 4
    101
    Correct
    Wrong
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Answer : 2. "111 "

Q:

The ratio of two numbers is 2: 3 and their L.C.M is 48.  What is the number?

1408 0

  • 1
    8, 6
    Correct
    Wrong
  • 2
    16, 24
    Correct
    Wrong
  • 3
    18, 32
    Correct
    Wrong
  • 4
    25, 28
    Correct
    Wrong
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Answer : 2. "16, 24"

Q:

Find the HCF of 60, 148 and 382.

1404 0

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

Q:

a and b are two whole numbers and c is their HCF, then the LCM of those two numbers is

1379 0

  • 1
    ab/c
    Correct
    Wrong
  • 2
    abc
    Correct
    Wrong
  • 3
    bc
    Correct
    Wrong
  • 4
    ac/b
    Correct
    Wrong
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Answer : 1. "ab/c"

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