IBPS RRB 2016-17 - Quant Quiz-11

Directions(1-10): Find the missing numbers in the given series below:

1. 8, 4.5, 5.5, 13, 56, _

A. 356
B. 450
C. 386
D. 456
E. None of these

2. 6, 13, 20, 65, 256, _

A. 1286
B. 1280
C. 1289
D. 1283
E. None of these

3. 7, 11, 23, 43, 71, _

A. 105
B. 106
C. 107
D. 103
E. None of these

4. 5, 9, 9, 43, 147, _

A. 183
B. 186
C. 185
D. 187
E. None of these

5. 1, 10, 25, 52, 97, _

A. 165
B. 167
C. 166
D. 156
E. None of these

6. 9000, 1795, 355, 68, _, 1.32

A. 11.6
B. 12.6
C. 10.6
D. 9.6
E. None of these

7. 7, 13, 37, 125, 515, _

A. 2589
B. 2450
C. 2120
D. 2685
E. None of these

8. 87, 87, 135, 327, 807, _

A. 1767
B. 1867
C. 1967
D. 1676
E. None of these

9. 960, 960, 976, 912, 1056, _

A. 800
B. 715
C. 750
D. 512
E. None of these

10. 1290, 620, 252, 78, 14, _

A. 10
B. 6
C. 5
D. 0
E. None of these

                                                             ANSWERS

1. 8*0.5 + 0.5 = 4.5

    4.5*1 + 1 = 5.5

    5.5*2 + 2 = 13

    13*4 + 4 = 56 

    56*8 + 8 = 456

2. 6*1 +7 = 13

    13*2 - 6 = 20

    20*3 + 5 = 65

    65*4 - 4 = 256

    256*5 + 3 = 1283.

3. 7 + 4*1 = 11

    11 + 4*3 = 23

     23 + 4*5 = 43

     43 + 4*7 = 107

4. 5*1 + 4 = 9

    9*2 - 9 = 9

    9*3 + 16 = 43

    43*4 - 25 = 147

  147*5 + 36 = 183

5. 10 - 1 = 9

    25 - 10 = 15 

    52 - 25 = 27

    97 - 52 = 45

    Taking difference of the differences,

    15 -9 = 6 

    27 - 15 = 12

    45 - 27  = 18

Thus, 18 + 6 = 24 

     24 + 45 = 69

     97 + 69 = 166.

6. 9000/5 - 5 = 1795

    1795/5 - 4 = 355

     355/5 - 3 = 68

     68/5 - 2 = 11.6

     11.6/5 - 1 = 1.32

7. 7*1 + 6 = 13

  13*2 + 11 = 37

  37*3 + 14 = 125

  125*4 + 15 = 515

  515*5 + 14 = 2589

8. 87 + (0*2*4) = 87

    87 + (2*4*6) = 135

   135 + (4*6*8) = 327

   327 + (6*8*10) = 807

   807 + (8*10*12) = 1767

9. 960 - 0^2 = 960

    960 + 4^2 = 976

    976 - 8^2 = 912

    912 + 12^2 = 1056

   1056 - 16^2 = 800

10. 6^4 - 6 = 1290

      5^4 - 5 = 620

      4^4 - 4 = 252

      3^4 - 3 = 78

      2^4 - 2 = 14

      1^4 - 1 = 0   

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