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Letter series type of questions usually consists of a series of small letters which follow a certain pattern. However, some letters are missing from the series. These missing letters are then given in a proper sequence as one of the alternatives. The candidate is requitred to choose this alternative as the answer.

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

G4T, J10R, M20P, P43N, S90L

Option:
A. G4T
B. J10R
C. M20P
D. P43N
E. S90L
Answer: B . J10R

Justification:

The first letter of each term is moved three steps forward and
the last letter is moved two steps backward to obatin the corresponding letters of the next term.
The numbers follow the sequence x 2 + 1, x 2 + 2, x 2 + 3, x 2 + 4.
So, 10 is wrong and must be replaced by (4 x 2 + 1)  i.e. 9.

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