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How many such pairs of letters are there in the word "BONAFIDE" such that the number of letters between them is the same as in the English alphabetical series, considering both forward and backward directions?
- Three
- Four
- Five
- Six
Correct answer: Six
Solution
We need pairs of letters whose positional gap in the word equals the gap between their alphabetical positions. In "BONAFIDE", the valid pairs are counted by checking all combinations and matching the required condition in forward or reverse alphabetical order. The total number of such pairs is six.
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