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Refer to the following letter, number and symbol series and answer the question that follows.
How many such symbols are there that are immediately preceded by a letter and immediately followed by a number?
0
1
2
3
0
Scan the series by focusing only on letters first, then check if the immediate next character is a symbol and the one after that is a number.
Scan the series by focusing only on letters first, then check if the immediate next character is a symbol and the one after that is a number.
Define the Target Pattern
The required condition is a symbol that is immediately preceded by a letter and immediately followed by a number (Letter тЖТ Symbol тЖТ Number).
Scan for Letters
Look through the series (4 7 9 $2 @ 5 K # 8 6 2 & / * M 3 % D Q @ L) to locate all letters: K, M, D, Q, L.
Evaluate Neighborhood of Each Letter
Checking around the letter K gives the sequence K # 8, where K is a letter, # is a symbol, and 8 is a number. Other letters are not followed by a symbol and a number in that order.
Final Count Verification
There is exactly 1 such symbol (#) satisfying the given condition throughout the entire series.
A: 0 is incorrect because one valid combination exists. C: 2 is incorrect because there is only one matching sequence, not two. D: 3 is incorrect because scanning reveals only a single valid occurrence.
B is correct because the symbol # is immediately preceded by the letter K and immediately followed by the number 8, giving a total count of 1.
Always isolate one target element type at a time, such as letters, to speed up scanning and prevent overlooking valid triplets.