SERIES

SERIES:

NUMBER SERIES : Once you have identified the pattern, apply it to the number before/ after the missing number in the series to get the desired
answer.

NUMBER SERIES PATTERNS :

1. Prime Numbers :

 Given numbers are a series of prime numbers.

Example : 11, 13, 17, 19...

 2. Squares/ Cubes of numbers:

 Given numbers are a series of perfect square or cube roots.
 

Example :

3. Patterns in differences :

Calculate the differences between the numbers given in the series.

Example :

2, 5, 8, 11, 14... (here the difference between the numbers is 3, hence the next number will be 17)

4. Geometric series:

when each successive number in the series is obtained by multiplying or dividing the previous number by a fixed number.

Example : 5,45, 405, 3645

5. Odd One out :

when all but one number is part of a series 

For example : - 5, 10, 12,15, 20... (Here all numbers except, 12 are multiples of 5)

ALPHABET SERIES:

While solving the problems based on the alphabet, you must have in your mind the exact positions of every letter of the alphabet in forwarding order as well as in backward or reverse order as given below:

M=13, X=24, Y=25, Z=26.

K=11, L=12, M=13

Y=2,  Z=1

Here, mth element to be counted from left to right of a series of x characters is equal to (x + 1 - m)th element to be counted from right to left of that series.

Example :

Find out the position of K in the above given series counting from right to left.

Position of "K" in the English alphabet from left to right is 11. Thus m = 11Position of K in the above given series from right to left would be (26 + 1 - 11) =16

The first half of alphabet series is from A to M., i.e., 1 -13 and Second half is from N to Z. i.e., 14 - 26

Tricks .

l. EJOTY: To make it easier there is a trick called EJOTY (i.e From left to Right) by which you can simply locate the position of letter without much effort.

Suppose we want to find the place of the 20th letter from the left side. And you know 20th letter is T, so now, you only have to find a letter which is two positions ahead of T, which is V.

ll. VQLGB : It is similar to EJOTY but this is in reverse order i.e from right to left.