16. The H.C.F of two numbers is 12 and their difference is also 12. The number are ?

1. 1. 66, 78

   
   
   

   2. 70, 82

   
   
   

   3. 94, 106

   
   
   

   4. 84, 96

   
   
   

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1. View Hint View Answer Discuss in Forum

   The difference of requisite number must be 12 and each one must be divisible by 12, so the numbers are 84, 96.

   Correct Option: D

   The difference of requisite number must be 12 and each one must be divisible by 12, so the numbers are 84, 96.

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17. H.C.F of three numbers is 12. If they be in the ratio 1: 2: 3, the numbers are ?

1. 1. 12, 24, 36

   
   
   

   2. 10, 20, 30

   
   
   

   3. 5, 10, 15

   
   
   

   4. 4, 8, 12

   
   
   

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1. View Hint View Answer Discuss in Forum

   Straight forward answer 12, 24, 36

   Correct Option: A

   Straight forward answer 12, 24, 36

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18. L. C . M of 2/7, 3/14 and 5/ 3 is ?

1. 1. 45

   
   
   

   2. 35

   
   
   

   3. 30

   
   
   

   4. 25

   
   
   

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1. View Hint View Answer Discuss in Forum

   L. C . M of 2/7, 3/14 and 5/ 3 = ( LCM of 2, 3 and 5) / ( HCF of 7, 14 and 3)

   Correct Option: C

   L. C . M of 2/7, 3/14 and 5/ 3 = ( LCM of 2, 3 and 5) / ( HCF of 7, 14 and 3)
   = 30

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19. Which of the fractions 1/2, 3/7, 3/5, 4/9 is the smallest ?

1. 1. 4/9

   
   
   

   2. 3/5

   
   
   

   3. 3/7

   
   
   

   4. 1/2

   
   
   

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1. View Hint View Answer Discuss in Forum

   3/7

   Correct Option: C

   3/7

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20. Which of the following is in descending order ?

1. 1. 3/5, 5/7, 7/9

   
   
   

   2. 7/9, 5/7, 3/5

   
   
   

   3. 5/7, 7/9, 3/5

   
   
   

   4. 7/9, 3/5, 5/7

   
   
   

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1. View Hint View Answer Discuss in Forum

   7/9, 5/7, 3/5

   Correct Option: B

   7/9, 5/7, 3/5

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