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Directions (Q. 91-95): In each of these questions a number series is given. Below the series one number is given followed by (a), (b), (c), (d), and (e). ​ You have to complete this series following the same logic as in the original series and answer the question that follows.

91.    5    9    25    91    414    2282.5

         3    (a)  (b)    (c)   (d)    (e)

What will come in place of ©?

  1. 63.25
  2. 63.75
  3. 64.25
  4. 64.75
  5. None of these

92.    15    9     8    12     36     170

         19    (a)    (b)   (c)    (d)    (e)

What will come in place of (b)?

  1. 18
  2. 16
  3. 22
  4. 24
  5. None of these

93.     7     6      10     27     104      515

         9      (a)    (b)   (c)      (d)        (e)

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91).

Logic by @Vijay ...

5     9   25    91     414    2282.5

3     a     b     c        d        e


5

9    = (5 * 3  + 3)/2 

25  = (9 * 5  + 5)/2

91  = (25 * 7 + 7)/2

414 =(91 * 9 + 9)/2

2282.5 = ( 414 * 11 + 11)/2


Similarly,

3

a = (3 *3 +3 )/2 = 6

b = (6 *5 + 5)/2 = 17.5

c = (17.5 * 7 + 7)/2 = 64.75 (Ans - option 4)



92).      15        9          8          12          36           170

gaps==>     6         1          4           24           134

Now, see how to get these next numbers by using these gaps .

(I only applied many hit and trial methods and no special logic and so it took a lot of time).

15 * 1 - 6 * 1 = 9

9 * 2 - 5 * 2 = 8

8 * 3 - 4 * 3 = 12

12 * 4 - 3 * 4 = 36

36 * 5 - 2 * 5 = 170

Using same method for next series,

19 * 1 - 6 * 1 = 13

13 * 2 - 5 * 2 = 16 ( Answer )



93).    7        6        10         27         104         515

gaps==> 1         4         17         77          411 

I tried to use the same logic as above .

7 * 1 - 1 = 6

6 * 2 - 2 = 10

10 * 3 - 3 = 27

27 * 4 - 4 = 104

104 * 5 - 5 = 515

Now, applying this same style for next series,

9 * 1 - 1 = 8

8 * 2 - 2 = 14 ( Answer )



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