HCF and LCM Practice Question and Answer

Q:

The greatest number, which when subtracted from 5834, gives a number exactly divisible by each of 20, 28, 32 and 35, is 

1115 0

  • 1
    1120
    Correct
    Wrong
  • 2
    4714
    Correct
    Wrong
  • 3
    5200
    Correct
    Wrong
  • 4
    5600
    Correct
    Wrong
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Answer : 2. "4714 "

Q:

The greatest number, which when divides 989 and 1327 leave remainder 5 and 7 respectively: 

1216 0

  • 1
    8
    Correct
    Wrong
  • 2
    16
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    32
    Correct
    Wrong
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Answer : 3. "24"

Q:

If A and B are the HCF and LCM respectively of two algebraic expressions x and y, and A + B = x + y, then the value of A3 + B3 is 

1273 0

  • 1
    $$x^3-y^3 $$
    Correct
    Wrong
  • 2
    $$x^3$$
    Correct
    Wrong
  • 3
    $$y^3$$
    Correct
    Wrong
  • 4
    $$x^3 + y^3$$
    Correct
    Wrong
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Answer : 4. "$$x^3 + y^3$$"

Q:

Find the greatest number which will exactly divide 200 and 320. 

1940 0

  • 1
    10
    Correct
    Wrong
  • 2
    20
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    40
    Correct
    Wrong
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Answer : 4. "40"

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Answer : 2. "6"

Q:

The HCF of two numbers 12906 and 14818 is 478. Their LCM is:

1841 0

  • 1
    400086
    Correct
    Wrong
  • 2
    200043
    Correct
    Wrong
  • 3
    600129
    Correct
    Wrong
  • 4
    600129
    Correct
    Wrong
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Answer : 1. "400086 "

Q:

The ratio of two numbers is 4:5 and their LCM is 120. The numbers are

2439 0

  • 1
    30, 40
    Correct
    Wrong
  • 2
    40, 32
    Correct
    Wrong
  • 3
    24, 30
    Correct
    Wrong
  • 4
    36, 20
    Correct
    Wrong
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Answer : 3. "24, 30"

Q:

A number of friends decided to go on picnic and planned to spend Rs. 108 on eatables. Three of them however did not turn up. As a consequence, each one of the remaining had to contribute Rs 3. extra. The number of them who attended the picnic was:

2716 0

  • 1
    15
    Correct
    Wrong
  • 2
    12
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
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Answer : 3. " 9"

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