Find the group of wrong alphabet in the following series.

LX, IL, SB, OD, NA

This question was previously asked in
RRB JE Previous Paper 12 (Held On: 26 May 2019 Shift 1)
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  1. LX
  2. SB
  3. IL
  4. NA

Answer (Detailed Solution Below)

Option 2 : SB
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Detailed Solution

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Common Diagram 28.01.2020 D1

The pattern followed here is:

LX:  L is the 12th letter (not prime), X is the 24th letter (not prime).

IL:   I is the 9th letter (not prime), L is the 12th letter (not prime).

SB:  S is the 19th letter (prime),  B is the 2nd letter (prime).

OD:  O is the 15th letter (not prime), D is the 4th letter (not prime).

NA:  N is the 14th letter (not prime), A is the 1st letter (not prime).

SB is the only pair where both letters have prime positional values (19 and 2). 

Hence, ‘SB’ is the wrong alphabet among them.

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