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Refer to the given number and symbol series and answer the question that follows. Counting to be done from left to right only.
How many such numbers are there, each of which is immediately preceded by a number and also immediately followed by another number?
1
2
3
4
1
Look for sequences of three consecutive numbers. Scan the series once, identifying number-number-number triplets while ignoring symbols.
Look for sequences of three consecutive numbers. Scan the series once, identifying number-number-number triplets while ignoring symbols.
Identify the criteria
We need to find numbers that are immediately preceded by a number AND immediately followed by a number. This means we are looking for a 'Number-Number-Number' triplet pattern in the series.
Scan the series
The series is: , 1, &, 8, 4, 7, £, *, 5, 3, @, 2, \%, 9, +, Ω, 6, #. \text{Listing the elements sequentially}: (, 1, &), (1, &, 8), (&, 8, 4), (8, 4, 7), (4, 7, £), (7, £, *), (£, , 5), (, 5, 3), (5, 3, @), (3, @, 2), (@, 2, %), (2, %, 9), (%, 9, +), (9, +, Ω), (+, Ω, 6), (Ω, 6, #). Checking each triplet for (Number, Number, Number) pattern: None of the triplets satisfy this.
Final Verification
There are no instances in the given series where three numbers appear consecutively (N-N-N). Therefore, the count is zero.
B: 1 is incorrect because there is no such triplet. C: 2 is incorrect because there is no such triplet. D: 3 is incorrect because there is no such triplet.
A is correct because there are no sequences of three consecutive numbers (N-N-N) present in the given series.
In alphanumeric series questions, always list the series clearly and use markers to identify the condition (e.g., N for Number, S for Symbol) to avoid missing elements.
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