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Refer to the following letter series and answer the question that follows. Counting to be done from left to right only.
(Left) S W L V F E D N M B H I O P L M J U H B N V F R T Y G B V C D E W (Right)
How many letters are there in the English alphabetical series between the letter which is third from right end and the letter that is third from left end?
7
4
6
9
7
Quick Trick: Identify the target letters from left and right ends, find their standard alphabetical positions, and subtract them: (Position2 - Position1) - 1.
Identify the target letters from left and right ends, find their standard alphabetical positions, and subtract them: (Position2 - Position1) - 1.
Identify Target Letters from the Given Series
Counting from the left end, the 1st is S, 2nd is W, and 3rd is L. Counting from the right end, the 1st is W, 2nd is E, and 3rd is D.
Determine Standard English Alphabet Ranks
Find the positional values of letters D and L in the standard A-Z English alphabetical order: D is the 4th letter and L is the 12th letter.
Calculate the Count of Letters Between D and L
The letters lying strictly between D and L are E, F, G, H, I, J, K. Counting them directly gives 7 letters. Mathematically: (12 - 4) - 1 = 7.
B: Incorrect, 4 counts only E, F, G, H ignoring I, J, K. C: Incorrect, 6 misses one letter in the count. D: Incorrect, 9 includes boundary letters or miscalculates (12 - 4 + 1).
A is correct because the 3rd letter from the left is L (12th in A-Z) and the 3rd letter from the right is D (4th in A-Z), and there are exactly 7 letters (E, F, G, H, I, J, K) between D and L in the standard English alphabet.
Always pay close attention to whether the question asks for letters between the target elements in the 'given sequence' or in the standard 'English alphabetical series'.