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Refer to the following series and answer the question (all numbers are single digit numbers only).
(Left) 6 2 1 3 7 6 9 7 4 3 5 2 3 4 3 4 2 3 1 5 7 9 5 8 5 7 5 (Right)
How many such even digits are there each of which is immediately preceded by an even digit and also immediately followed by an odd digit?

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RPF Constable 2024 Official Paper (Held On 03 Mar, 2025 Shift 2)
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  1. 2
  2. 3
  3. 1
  4. 0

Answer (Detailed Solution Below)

Option 1 : 2
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Detailed Solution

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Given series: (Left) 6 2 1 3 7 6 9 7 4 3 5 2 3 4 3 4 2 3 1 5 7 9 5 8 5 7 5 (Right)

Condition to be checked.

Even Digit - Even Digit - Odd Digit

(Left) 6 2 1 3 7 6 9 7 4 3 5 2 3 4 3 4 2 3 1 5 7 9 5 8 5 7 5 (Right)

Thus, there are two such even digits( 621, 423).

Hence, the correct answer is "Option 1".

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