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Question

Refer to the following number and symbol series and answer the question that follows.
All numbers are single-digit. Counting to be done from left to right only.
(Left) 4 6 @ 2 & % 8 $ 7 + 1 * £ 5 & 3 Ω 9 # (Right)
How many such symbols are there each of which is immediately preceded by a number and also immediately followed by another number?

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
5

Number and Symbol Series Analysis

The question asks to identify symbols within the given series that are immediately surrounded by numbers (one number before and one number after).

The provided series is: $4 6 @ 2 & % 8 $ 7 + 1 * £ 5 & 3 Ω 9 #$

Step-by-step Symbol Check

We will examine each symbol in the series from left to right:

  • @: Preceded by $6$ (number), followed by $2$ (number). This is a match.
  • &: Preceded by $2$ (number), followed by $%$ (symbol). Not a match.
  • %: Preceded by $&$ (symbol), followed by $8$ (number). Not a match.
  • $: Preceded by $8$ (number), followed by $7$ (number). This is a match.
  • +: Preceded by $7$ (number), followed by $1$ (number). This is a match.
  • *: Preceded by $1$ (number), followed by $£$ (symbol). Not a match.
  • £: Preceded by $*$ (symbol), followed by $5$ (number). Not a match.
  • &: Preceded by $5$ (number), followed by $3$ (number). This is a match.
  • : Preceded by $3$ (number), followed by $9$ (number). This is a match.
  • #: Preceded by $9$ (number), followed by the end of the series. Not a match.

Counting Matching Symbols

The symbols that satisfy the condition (immediately preceded by a number and immediately followed by another number) are: $@$, $, $+$, $&$, and $Ω$.

Therefore, there are a total of 5 such symbols.

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