16. 5, 10, 13, 26, 29, 58, 61, (...) :

1. 1. 122

   
   
   

   2. 64

   
   
   

   3. 125

   
   
   

   4. 128

   
   
   

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1. View Hint View Answer Discuss in Forum

   Numbers are alternately multiplied by 2 and increased by 3. So, the missing number = 61 x 2 = 122.
   

   Correct Option: A

   Numbers are alternately multiplied by 2 and increased by 3. So, the missing number = 61 x 2 = 122.
   

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17. 11, 13, 17, 19, 23, 29, 31, 37, 41,(...):

1. 1. 43

   
   
   

   2. 47

   
   
   

   3. 53

   
   
   

   4. 51

   
   
   

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1. View Hint View Answer Discuss in Forum

   Number are all primes. The next prime is 43.

   Correct Option: A

   Number are all primes. The next prime is 43.

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18. 253, 136, 352, 460, 324, 631, 244 ?

1. 1. 136

   
   
   

   2. 324

   
   
   

   3. 352

   
   
   

   4. 631

   
   
   

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1. View Hint View Answer Discuss in Forum

   Sum of the digits in each number, except 324 is 10.

   Correct Option: B

   Sum of the digits in each number, except 324 is 10.

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19. 4, 5, 7, 10, 14, 18, 25, 32 ?

1. 1. 7

   
   
   

   2. 14

   
   
   

   3. 18

   
   
   

   4. 32

   
   
   

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1. View Hint View Answer Discuss in Forum

   2nd = (1st + 1) : 3rd = (2nd + 2); 4th = (3rd + 3); 5th = (4th +4).

   Correct Option: C

   2nd = (1st + 1) : 3rd = (2nd + 2); 4th = (3rd + 3); 5th = (4th +4).
   
   But 18 = 6th term not equal ≠ 5th + 5 = 14 + 5 = 19.
   

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20. 36, 54, 18, 27, 9, 18.5, 4.5 ?

1. 1. 4.5

   
   
   

   2. 18.5

   
   
   

   3. 54

   
   
   

   4. 18

   
   
   

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1. View Hint View Answer Discuss in Forum

   The terms are alternately multiples by 1.5 and divided by 3.

   Correct Option: B

   The terms are alternately multiples by 1.5 and divided by 3. However 18.5 does not satisfy it.

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