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Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Note: All numbers are single digit numbers only.)
How many such symbols are there, each of which is immediately preceded by a number and also immediately followed by another number?
None
One
Two
Three
Three
Look for a triplet format: [Number] - [Symbol] - [Number]. Scan the series specifically identifying every symbol and checking its immediate neighbors.
Look for a triplet format: [Number] - [Symbol] - [Number]. Scan the series specifically identifying every symbol and checking its immediate neighbors.
Analyze the pattern requirements
We need to find a pattern: Number → Symbol → Number. The symbol must have a digit on its immediate left and immediate right.
Scan the sequence
Given: 6(N) £(S) 2(N) @(S) %(S) 7(N)₈(N) #(S) 1(N)₃(N) *(S) 9(N) $(S) &(S) 4(N) ^(S) ≺(S) 5(N). Triplets are: 1) 6 £ 2, 2) 8 # 1, 3) 3 * 9.
Final Verification
Counting the valid occurrences: (6 £ 2), (8 # 1), (3 * 9). Total count is 3.
A: None is incorrect as there are 3 valid triplets. B: One is incorrect as it ignores two other valid triplets. C: Two is incorrect as it misses the third valid triplet (3 * 9).
D is correct because there are exactly three instances (6 £ 2), (8 # 1), and (3 * 9) where a symbol is sandwiched between two single-digit numbers.
In alphanumeric series, always mark symbols first, then check the immediate neighbors to save time and avoid missing elements.