HCF and LCM Practice Question and Answer

Q:

Find the L.C.M of $$ {6x}{y^{2}z},{8x^{2}{y^{3}z^{2},{12{x^{3}{y^{3}z^{3}}}}}}$$.

857 0

  • 1
    2xyz
    Correct
    Wrong
  • 2
    $$ {4x}{y^{2}z}$$
    Correct
    Wrong
  • 3
    $$ {3x}{y^{2}z}$$
    Correct
    Wrong
  • 4
    $$ {2x}{y^{2}z}$$
    Correct
    Wrong
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Answer : 4. "$$ {2x}{y^{2}z}$$"

Q:

Find out the H.C.F of 306, 204 and 136.

2232 0

  • 1
    17
    Correct
    Wrong
  • 2
    51
    Correct
    Wrong
  • 3
    68
    Correct
    Wrong
  • 4
    34
    Correct
    Wrong
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Answer : 4. "34"

Q:

The HCF and LCM of two number are 20 and 120, respectively. If one number is 50 percent more than the other number, then which is the smaller number.

1274 0

  • 1
    80
    Correct
    Wrong
  • 2
    40
    Correct
    Wrong
  • 3
    60
    Correct
    Wrong
  • 4
    20
    Correct
    Wrong
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Answer : 2. "40"

Q:

The  LCM of two numbers is 45 times their HCF. If one of the numbers is 125 and sum of HCF and LCM is 1150. The other numbers is-

1509 0

  • 1
    225
    Correct
    Wrong
  • 2
    235
    Correct
    Wrong
  • 3
    240
    Correct
    Wrong
  • 4
    250
    Correct
    Wrong
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Answer : 1. "225"

Q:

The greatest number that can be subtracted from 10000 so that the remainder may be divisible by 32, 36, 48 and 54 is-

2085 1

  • 1
    9136
    Correct
    Wrong
  • 2
    9216
    Correct
    Wrong
  • 3
    9316
    Correct
    Wrong
  • 4
    9236
    Correct
    Wrong
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Answer : 1. "9136"

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

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

789 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:

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: 

812 0

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

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