Missing and wrong series for IBPS Clerk 2021

 In this article, I will cover all previous year's questions for ibps clerk. You should know you will get 5 questions on this topic in the forthcoming exam of ibps clerk 2021. You just need to relax and only practice selected questions provided here so that the same pattern will come and you can click there easily.

BASED ON PREVIOUS YEARS:

Q1. 2    3   8  ?    112   565

a. 36    b. 14   c. 27   d. 45   e. None of these.

Sol- 2×1 +1 =3

        3×2 +2 =8

        8× 3 +3 = 27

        27 ×4 + 4 = 112

Ans- c

Q2.   6  4  8  23   ?  385.25

a. 84.50   

b. 73

c. 78.50

d. 82

e. None of these.

Sol- 6 × 1/2 +1 =4

      4 × 1.50 + 2 =8

     8 × 2.50  + 3 = 23

    23 × 3.50 + 4 = 84.50

Ans- a

Q3. 8   64   216   512   ?  1728

a. 729

b. 1331

c. 684

d. 1000

e. None of these.

Sol- 8 = 2^3

       64 = 4^3

        216 = 6^3

       512 = 8^3

       Difference  of 2 is going on in the series so the immediate next term will be 10^3 =1000

Ans-d

Q4. 81   90   26   51    -165   ?

a. 214 

b. -214

c. 116

d. -116

e. 120

Sol- step1: Just take common difference in the series 

 9      -64    25  - 216

Now, you can see each no. Is in form of square and cube alternatively, started from squaring. 

3^2    (-4)^3      5^2    (-6)3    (7^2)

SO, Missing term = -165  + 49 = -116

Ans- d

Q5. 4  18  48  100  180  294  ?

a. 448 

b. 424

c. 436

d. 460

e. None of these.

Sol- step1- write common difference  

14   30   52   80   114

Step2 - again write common difference present in first common difference series.

16     22   28   34 

Step3- now common difference =6 

Step4- ? = 294 + 114 +34 +6 = 448

Ans- a.

Q6. 30  46  78  126   190  270  ?

a. 356

b. 366

c. 382

d. 398

e. None of these.

Sol-  Take common difference present in the series

 16    32    48   64   80  .........

.......= 80 + 16 = 96

? = 270 +96 =366

Ans- b

Q7. 380  465    557   656   762   ?  995

a. 855

b. 915

c. 875

d.895

e. None of these. 

Sol- write first common difference = 85 92 99 106 113  120 

Second common difference = 7   7   7   7   7

So, ? = 762 + 113 = 875

Q8.  12    12    18   45     180   1080  ? 

a. 9285 

b. 9530

c. 9170

d. 9180

e.  None of these.

Sol- 12 × 1=12

        12 × 1.5 =18

          18 × 2.5 = 45

          45 × 4= 180

           180 × 6 = 1080

           1080 × 8.5 = 9180

Ans-d.

Q9. ?  61  211   505   991   1717

a. 6

b. 5

c. 8

d. 7

e. None of these.

Sol-  initial the first term is missing so, it became very difficult  question but you need to  fix it.

Focus on rest of the terms . Write common difference for rest of terms.

?     150  294   486   726

Second c.d = ?  96  144  192  240 

Third c.d = 48  48  48 

Now, 61 = ? + 150 - 96

 Or, ? = 7

Ans- d.