HCF and LCM Practice Question and Answer

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.

713 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:

What is the HCF of 16, 72 and 28 ?

930 0

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

Q:

The LCM of two consecutive even numbers is 144, find the numbers?

1043 0

  • 1
    16 and 18
    Correct
    Wrong
  • 2
    14 and 16
    Correct
    Wrong
  • 3
    18 and 20
    Correct
    Wrong
  • 4
    22 and 24
    Correct
    Wrong
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Answer : 1. "16 and 18 "

Q:

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

821 0

  • 1
    21
    Correct
    Wrong
  • 2
    42
    Correct
    Wrong
  • 3
    63
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 1. "21"

Q:

Two numbers are in the ratio 3 : 5 and their HCF is 20. Their LCM is

867 0

  • 1
    60
    Correct
    Wrong
  • 2
    300
    Correct
    Wrong
  • 3
    30
    Correct
    Wrong
  • 4
    10
    Correct
    Wrong
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Answer : 2. "300"

Q:

Find the HCF of 3341 and 3328.

799 0

  • 1
    257
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    337
    Correct
    Wrong
  • 4
    31
    Correct
    Wrong
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Answer : 2. "13"

Q:

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

845 0

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

Q:

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

894 0

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

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