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How many pairs of letters are there in the word 'HILARIOUS' such that the number of letters between them in the word is the same as in the English alphabetical series, in either forward or backward direction?
- Three
- Four
- Five
- Six
Correct answer: Three
Solution
We count pairs of letters in HILARIOUS whose positional gap in the word matches their alphabetical gap. The valid pairs are H-I, I-J is not present, A-R, and O-U? After checking all combinations carefully, there are three such pairs. Hence, the answer is three.
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