Quant Notes | Number Series

NUMBER SERIES

Q1.516      256      126      61      28.5      ?
Q2. 18      82      118      134      ?

Number series is one of the most important topic in bank exam which is asked mostly all bank exams.So here we are providing some types of number series....

Difference Series
Ratio Series
Mixed Series
Geometric Series
Two Tier Arithmetic Series
Other Types

1  Difference series

Eg1.   1348, 1338, 1318, 1288, 1248, ?

Ans.  1198.

pattern : +10, +20, +30, +40,...........

Eg2.   240, 205, 177, 156, 142, ?

 Ans. 135
Pattern : - 35, - 28, - 21, - 14, ………

2 Two stage of number series

Eg1.  4, 5, 9, 16, 26, 39, ?

Ans.  55 . 

Eg2.   11, 18, 29, 42, 59, ?, 101

Ans.  78.

3. Square series

Eg1.  8, 12, 28, 64, 128, ?
Ans.  228.

 

  Perfect Square Series

 Eg1.  480,       525,        572,     621,      672,      ? 

Ans. 725

pattern:   222-4    232-4    242-4    252-4    262-4    272-4

4. Perfect cube series

Eg1.   1331, 2197, 3375, 4913, ? 
Ans  6859.
pattern :  11³ ,   13³ ,  15³ ,  17³ ,  19³

5. Prime number series 

 Prime Number series-In this kind of series next term is find out by adding, multiplying or dividing by prime numbers.

2,   4 ,   12,    60,    420,

6. multiplication and division number series

Eg.1  16 ,     32,    96,     384,      1920,         ?

Ans.   11520.

Eg2. 108,     72 ,        36,         24,           12,           ?
Ans. 8

 

 

 

 

Practice Question

 Q1.  23    28    38    53    73    ? 

(1) 98
(2) 99
(3) 95
(4) 97
(5) 96

 

 Q2.  723     712     690     657     613    ?

(1) 556
(2) 551
(3) 552
(4) 558
(5)None of these

 Q3.  90    110    132    156    182     ?

(1) 207
(2) 307
(3) 309
(4) 323
(5) 310

 Q4.  17    45    148     607    ?    18331

(1) 3048
(2) 3056
(3) 3060
(4) 3052
(5) None of these

 Q5.  3     8     ?     204     1421     11360

(1) 32
(2) 35
(3) 36
(4) 30
(5) None of these

 Q6.  7      8       12      21      37     ? 

(1) 64
(2) 63
(3) 62
(4) 61
(5) 125

 Q7. 21     30     55     104     225     ? 

(1) 388
(2) 372
(3) 380
(4) 394
(5) 398 

 Q8. 6      18     42     90     186    ? 

(1) 390
(2) 384
(3) 360
(4) 370
(5) 378

Q9. 2     3       6     15     45       ?     

(1) 1575
(2) 2575
(3) 157.5
(4) 257.5
(5) 158.5

Q10. 5     6      21      110      777      ?

(1) 6993
(2) 4668
(3) 7002
(4) 7780
(5) 8558

more practice number series