Series Is a set or sequence of elements which may be numbers, letters, symbols etc… which either follow a particular pattern or has an internal logic between them. In general Number series and letter, series are asked in the exam.

Again in the number and letter series, there are

Again in the number and letter series, there are

**MISSING NUMBER/LETTER SERIES****WRONG NUMBER/LETTER SERIES**

Let us first discuss regarding number series. For some aspirants, number series is an easy and scoring topic but for some aspirants, it is t, e most difficult thing, Some can identify the logic between the numbers easily but for some, it is like is an irritating thing. As a set of 5 questions are asked in the exam we cannot afford to leave this topic. So for this regular practice is the key to success for this topic. First, let us divide the number series into following categories…

- Number based series
- Subtraction based series
- Multiplication based series
- Division based series
- Miscellaneous series

Practice this topic in an above-said manner. First, try the question whether it is a number based or Addition or difference based series then move on to the different categories.

To crack the series topic one should be perfect with Prime numbers, squares, cubes, squares of prime numbers, cubes of prime numbers.SQUARES |
|||
---|---|---|---|

1 | 1 | 26 | 676 |

2 | 4 | 27 | 729 |

3 | 9 | 28 | 784 |

4 | 16 | 29 | 841 |

5 | 25 | 30 | 900 |

6 | 36 | 31 | 961 |

7 | 49 | 32 | 1024 |

8 | 64 | 33 | 1089 |

9 | 81 | 34 | 1156 |

10 | 100 | 35 | 1225 |

11 | 121 | 36 | 1296 |

12 | 144 | 37 | 1369 |

13 | 169 | 38 | 1444 |

14 | 196 | 39 | 1521 |

15 | 225 | 40 | 1600 |

16 | 256 | 41 | 1681 |

17 | 289 | 42 | 1764 |

18 | 324 | 43 | 1849 |

19 | 361 | 44 | 1936 |

20 | 400 | 45 | 2025 |

21 | 441 | 46 | 2116 |

22 | 484 | 47 | 2209 |

23 | 529 | 48 | 2304 |

24 | 576 | 49 | 2401 |

25 | 625 | 50 | 2500 |

CUBES |
|||
---|---|---|---|

1 | 1 | 8 | 512 |

2 | 8 | 9 | 729 |

3 | 27 | 10 | 1000 |

4 | 64 | 11 | 1331 |

5 | 125 | 12 | 1728 |

6 | 216 | 13 | 2197 |

7 | 343 | 14 | 2744 |

15 | 3375 |

Number(N) | N^{2} |
N^{3} |
N^{2} +1 |
N^{2}-1 |
N^{3}-1 |
N^{3}+1 |
N^{n} |
N^{n }+1 |
N^{n/2} |
N^{3}+N |
N^{3}-N |
---|---|---|---|---|---|---|---|---|---|---|---|

0 | 0 | 1 | |||||||||

1 | 1 | 2 | |||||||||

2 | 4 | 9 | |||||||||

3 | 3 | 28 | |||||||||

4 | 16 | 65 | |||||||||

5 | 25 | 126 | |||||||||

6 | 36 | 217 | |||||||||

7 | 49 | 344 | |||||||||

8 | 64 | 513 | |||||||||

9 | 81 | 730 | |||||||||

10 | 100 | 1001 |

### Question 1. 144, 196, 256, 324, 400, 484, -----

### Question 2. 27, 125, 343, 729, -----

### Question 3. 17, 19, 23, 29, 31, 37,------

### Question 4. 64, 125, 216, 343, 512, 729,----

### Question 5. 6241, 6889, 7921, ------, 10201

### Question 6. 11, 22, 34, 47, 61, 76, -------

### Question 7. 11, 12, 16, 25, 41, 66, ------

### Question 8. 1, 2, 6, 30, 210, -------

### Question 9. 83, 168, 339, 683, 1373, 2757, ,--------

### Question 10. 6, 24, 120 , 336, 1320, 2184, -------

### Question 11. 15, 21, 24, 30, 33, ,-------

### Question 12. 43, 42, 40, 36, 33, ,--------

### Question 13. 3240, 540, 108, 27, …….., 4.5. ( IBPS PO PRLIMS-2017)

### Question 14. 7, 4.5, 5.5, 12, 49, -------( IBPS PO PRLIMS-2017)

### Question 15. 17, 98, 26, 89, 35, -------- ( IBPS PO PRLIMS-2017)

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