Refer to the following number, symbol series and answer the qu... | Stage I (CBT I) MCQ | Examoogle

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Stage I (CBT I)RRB ALP CBT-I 11 Mar, 2026 Shift 1

Refer to the following number, symbol series and answer the question. Counting to be done from left to right only. All numbers are single-digit numbers.

(Left) 5 % 3 + 8 1 8 \ / % 6 1 1 1 + # % 3 7 9 > (Right)

How many such symbols are there each of which is immediately preceded by a number and also immediately followed by a number?

Two

One

Three

None

Correct Answer

📚 GK • GK Pattern MatchingStage I (CBT I)RRB ALP CBT-I 11 Mar, 2026 Shift 1

Option A

Two

Quick Summary:

Quick Trick: Look specifically for symbols (% , + , , / , # , >) and quickly check if both the character immediately to its left and the character immediately to its right are digits.

🧩REReasoning SolutionPattern Matching⏱️ 25 Seconds

⚡ Quick Shortcut Trick

Look specifically for symbols (% , + , , / , # , >) and quickly check if both the character immediately to its left and the character immediately to its right are digits.

📊 Diagram / Illustration

🧩 Logic Steps

Define Target Condition

We need to count all occurrences in the given series that follow the sequence: [Number] -> [Symbol] -> [Number].

Index and Scan the Series

The given series from left to right is: 5 % 3 + 8 1 8 \ / % 6 1 1 1 + # % 3 7 9 > Let's locate every symbol and examine its immediate neighbors:

Symbol '%': Preceded by 5 (Number), Followed by 3 (Number) -> MATCH 1 (5 % 3)
Symbol '+': Preceded by 3 (Number), Followed by 8 (Number) -> MATCH 2 (3 + 8)
Symbol '': Preceded by 8 (Number), Followed by '/' (Symbol) -> Invalid
Symbol '/': Preceded by '' (Symbol), Followed by '%' (Symbol) -> Invalid
Symbol '%': Preceded by '/' (Symbol), Followed by 6 (Number) -> Invalid
Symbol '+': Preceded by 1 (Number), Followed by '#' (Symbol) -> Invalid
Symbol '#': Preceded by '+' (Symbol), Followed by '%' (Symbol) -> Invalid
Symbol '%': Preceded by '#' (Symbol), Followed by 3 (Number) -> Invalid
Symbol '>': Preceded by 9 (Number), Followed by Nothing -> Invalid

Verify Total Valid Counts

There are exactly 2 valid patterns where a symbol is immediately preceded by a number and immediately followed by a number: (5 % 3) and (3 + 8).

🚫 Why Other Options Are Wrong

B: Incorrect because there are 2 valid occurrences, not just 1. C: Incorrect because there are only 2 matching triplets in the entire series. D: Incorrect because valid occurrences do exist in the series.

✅

A is correct because exactly two symbols (% in '5 % 3' and + in '3 + 8') are immediately preceded by a number and immediately followed by a number.

Core Concepts Used

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Alphanumeric Series Analysis Preceded and Followed Conditions Pattern Spotting

💡 EXAM TIP

Always clearly define the target pattern as 'Element 1 - Target Element - Element 2' before scanning. Scan specifically for the middle element type (symbols in this case) to save time and prevent missing adjacent valid targets.

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