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

1373 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:

Which of the following numbers is divisible by 11?

1363 0

  • 1
    5214341
    Correct
    Wrong
  • 2
    5648741
    Correct
    Wrong
  • 3
    6598321
    Correct
    Wrong
  • 4
    2378965
    Correct
    Wrong
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Answer : 1. "5214341"

Q:

The HCF of two numbers is 4 and the two other factors of LCM are 5 and 7. Find the smaller of the two numbers.

1357 0

  • 1
    10
    Correct
    Wrong
  • 2
    14
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 3. "20"

Q:

The least multiple of 13, which on dividing by 4, 5, 6, 7 and 8 leaves remainder 2 in each case is 

1351 0

  • 1
    2522
    Correct
    Wrong
  • 2
    840
    Correct
    Wrong
  • 3
    2520
    Correct
    Wrong
  • 4
    842
    Correct
    Wrong
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Answer : 1. "2522 "

Q:

The HCF and LCM of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are-

1338 0

  • 1
    273, 357
    Correct
    Wrong
  • 2
    273,361
    Correct
    Wrong
  • 3
    273, 359
    Correct
    Wrong
  • 4
    273, 363
    Correct
    Wrong
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Answer : 1. "273, 357"

Q:

What is the greatest common factor of 2³ × 7² and 2⁵ × 3¹?

1337 0

  • 1
    2³ 3¹
    Correct
    Wrong
  • 2
    2³ 7² 3¹
    Correct
    Wrong
  • 3
    Correct
    Wrong
  • 4
    3¹ 7²
    Correct
    Wrong
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Answer : 3. "2³"

Q:

Find the LCM of x and (x+3).

1331 0

  • 1
    x(x+3)
    Correct
    Wrong
  • 2
    x2(x+3)
    Correct
    Wrong
  • 3
    (x+3)
    Correct
    Wrong
  • 4
    x
    Correct
    Wrong
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Answer : 1. "x(x+3)"

Q:

If the product of three consecutive numbers is 210 then sum of the smaller number is: 

1326 0

  • 1
    5
    Correct
    Wrong
  • 2
    11
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    4
    Correct
    Wrong
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Answer : 2. "11"

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