**This topic is based on series of numbers, letters or combination of letters, numbers and symbols.**

**Types of series**

- Letter Series
- Number Series
- Miscellaneous Series

This series is based on letter positions-

A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |

1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |

N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |

14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
25 |
26 |

**EXAMPLE :**

**Ex.1-2.**

**A B C D E F G H I J K L M N O P Q R S T U V W X Y Z**

**Ex.1. How many such vowels are there in the above arrangement each of which is immediately preceded as well as followed by a consonant?**

(1) One

(2) Two

(3) Three

(4) Four

(5) None of these

**Sol.(4) Consonant- Vowel - Consonant**

1. D E F

2. H I J

3. N O P

4. T U V

**Ex.2. What should come in the place of question mark (?)**

**A, C, F, J, ?**

(1) Q

(2) O

(3) T

(4) U

(5) None of these

**Sol. (2)**

**A C F J (O)**

**1 3 6 10 15**

**Number Series**

This series is based on Number Series.

**EXAMPLE :**

**Ex:3 1 2 6 5 3 2 1 8 9 6 5 3 2 1 2 3 1**

**How many 1’s are there in the above arrangement each of which is followed by 2?**

(1) One

(2) Two

(3) Three

(4) Four

(5) None of these

**Sol.(2) 1 2 6 5 3 2 1 8 9 6 5 3 2 1 2 3 1**

**Miscellaneous Series**

This Series is based on the position of letters, numbers and symbols.

**Ex.5-7. F @ 5 3 R $ J P E 1 H % I 8 4 B 8 A W**

**2 U G 6 * 9 Z N M © V**

**Ex.5. Which of the following element is 13th from the left end ?**

(1) %

(2) I

(3) Q

(4) 1

(5) None of these

**Sol.(2)**

F @ 5 3 R $ J P E 1 H %

**I**8 4 B 8 A W 2 U G 6 * 9 Z N M © v
1 2 3 4 5 6 7 8 9 10 11 12

**13****Points to Remember :-**

You can easily solve the problems based on this topic with the help of these short tricks -

**1. Starting points of the series is left end and ending point of the series is right end.**

**2. To solve the question easily you should break the series in combination of fivefive elements.**

We can easily understand the series problems by -

A | B | C | D | E | F | G | H | I | J | K | L | M |

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |

N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |

**3. left element – left element = left element 13th element from left – 8th element from left = 5th element from left is E.**

**4. right element – right element = right element 13th element from right – 8th element from right = 5th element from right is V.**

**5. left element + right element = left element 13th element from left + 8th element from right = 21th element from left is U.**

**6. right element + left element = right element 13th element from right + 8th element**

**from left = 21th element from right is F.**

**7. all these situations are based on condition of left end or right end.**

**8. Once the candidate knows the position of letters, he requires to learn time management. We don’t have much time and hence all the letters can’t be read thoroughly.**

E |
J |
O |
T |
Y |

5 |
10 |
15 |
20 |
25 |

**Words given above are just the arrangement of the alphabets having position multiples of 5 from this word we can learn position of 26 letters. Abovementioned five letters have, 4 their followers, and 4 their precedent.**

**9. Here a new word is given below in which the arrangement of letters have occupied positions in the multiples of 3, with the help of this word we can get the position of total 26 letters.**

C |
F |
I |
L |
O |
R |
U |
X |

3 |
6 |
9 |
12 |
15 |
18 |
21 |
24 |

**EXERCISE**

**Q.1-3. The questions are based on the following set of numbers.**

426, 768, 693, 286, 741

**Q.1. If all the numbers are arranged in descending order what will be the difference between the second digit of third number and first digit of second number?**

(1) 2

(2) 1

(3) 3

(4) 4

(5) None of these

**Q.2. If in each number the first and the second digits are interchanged, which number will be the second highest number.**

(1) 693

(2) 286

(3) 742

(4) 768

(5) 426

**Q.3. If in each number all the digits are arranged in ascending order, which number will be second lowest?**

(1) 426

(2) 768

(3) 693

(4) 268

(5) 741

**Q.4-5. On the basis of alphabet given below, answer the following questions-**

**A B C D E F G H I J K L M N O P Q R S T U V W X Y Z**

**Q.4. In the following letter series ,which will replace the question mark(?) ?**

**AIU, ELR, HOP, JRM, KUK, (?)**

(1) KWH

(2) LXH

(3) KXG

(4) KVG

(5) None of these

**Q.5. In the above alphabet series,18 letters from right were put in the reverse order ,then which letter will be the third at left of 22nd letter from left?**

(1) X

(2) J

(3) P

(4) O

(5) None of these