Important Questions of HCF and LCM Quantitative Aptitude | Zigya

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11.

If the students of 9th class are arranged in a row of 6, 8, 12 or 16, no student is left behind. Then the possible number of students in the class is

  • 60

  • 72

  • 80

  • 80

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12.

In a division sum, the divisor is 4 times the quotient and twice the remainder. If a and b are respectively the divisor and the dividend, then

  • fraction numerator 4 straight b minus straight a squared over denominator straight a end fraction equals 3
  • fraction numerator 4 straight b minus 2 straight a over denominator straight a squared end fraction space equals space 2
  • left parenthesis straight a plus 1 right parenthesis squared space equals space 4 straight b
  • left parenthesis straight a plus 1 right parenthesis squared space equals space 4 straight b
552 Views

13.

H.C.F. of 2 over 3 comma space space 4 over 5 space and space space 6 over 7 is

  • 48 over 105
  • 2 over 105
  • 1 over 105
  • 1 over 105
216 Views

14.

There are five bells which start ringing together at intervals of 3, 6, 9, 12 and 15 seconds respectively. In 36 minutes, how many times will the bells ring simultaneously?

  • 13

  • 12

  • 6

  • 6

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15.

The greatest number among  square root of 5 comma space space space cube root of 4 comma space space fifth root of 2 space comma space root index 7 of 3 spaceis

  • cube root of 4
  • root index 7 of 3
  • square root of 5
  • square root of 5
269 Views

16.

Two numbers are in the ratio 5 : 6. If their H.C.F. is 4, then their L.C.M. will be

  • 90

  • 96

  • 120

  • 120

1169 Views

17.

The greatest number, that divides 43, 91 and 183 so as to leave the same remainder in each case is

  • 9

  • 8

  • 4

  • 4

209 Views

18.

The H.C.F. and L.C.M. of two numbers are 21 and 84 respectively. If the ratio of the two numbers is 1 : 4, then the larger of the two numbers is

  • 12

  • 108

  • 48

  • 48

566 Views

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19.

Let x be the smallest number, which when added to 2000 makes the resulting number divisible by 12, 16, 18 and 21. The sum of the digits of x is

  • 7

  • 5

  • 6

  • 4

533 Views

20.

The greatest number among 
350, 440, 530 and 620 is

  • 350

  • 440

  • 530

  • 530

268 Views

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