CSAT 2022

Q. If the order of the letters in the English alphabet is reversed and each letter represents the letter whose position it occupies, then which one of the following represents ‘LUCKNOW?

a. OGXPMLD
b. OGXQMLE
c.  OFXPMLE
d. OFXPMLD
Correct Answer: d. OFXPMLD

Question from UPSC Prelims 2022 CSAT Paper

Explanation : 

Deciphering the representation of ‘LUCKNOW’ after reversing the order of English alphabet letters.

The English alphabet has 26 letters. If we assign a numerical value to each letter based on its position in the alphabet (A=1, B=2, C=3 and so on), then we can find the reverse of each letter by subtracting its value from 27. This is because when the order of the alphabet is reversed, the first letter (A) becomes the last (Z), the second letter (B) becomes the second last (Y) and so on.

For example: L is the 12th letter in the alphabet. To find its reverse, we subtract its value from 27: 27-12=15. The 15th letter in the alphabet is O. So L becomes O when reversed.

Using this method we can find that: L -> O U -> F C -> X K -> P N -> M O -> L W -> D

So LUCKNOW becomes OFXPMLD when reversed using this method.

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