In given series, some letters are missing, these are given in option in that order. Select the option to complete the series in a pattern.
ba _ ba _ baab _ _

Appeared in: RRB Staff Nurse Ahmedabad-2015

Explanation

The goal is to find a set of letters that completes the series to form a repeating pattern.
The total length of the completed series is 12 letters, suggesting patterns could be in groups of 3 or 4.
Substituting 'aaaa' into the blanks (baa baa baabaa) creates the full series 'baabaabaabaa'.
This series can be broken down into a simple, repeating pattern of 'baa' repeated four times: (baa)(baa)(baa)(baa).

Option A: Substituting 'baba' creates 'babbabbabaab', which does not form a consistent, repeating logical pattern.
Option C: Substituting 'bbbb' creates 'babbabbaabbb', which lacks any discernible repeating sequence.
Option D: Substituting 'baab' creates 'babbaabaabab', which also fails to establish a clear and repeating pattern.

Visual 1: Infographic - A visual breakdown of the completed series 'b a a b a a b a a b a a' into four distinct blocks of 'baa' to clearly illustrate the repeating pattern.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning: Letter Series as background academic context rather than a clinical decision trigger.
This question assesses logical reasoning and pattern recognition, which are foundational cognitive skills for nurses.
Nurses use pattern recognition daily to identify changes in a patient's condition, interpret vital sign trends, and recognize adverse drug reactions from subtle cues.
Strong problem-solving skills, honed by exercises like this, are essential for effective clinical decision-making and troubleshooting issues with medical equipment.

How to Approach the Question

First, count the total number of positions in the series, including the blanks. Here, it's 12.
Consider the factors of the total length (e.g., 12 can be 3x4 or 4x3) as potential lengths for the repeating pattern.
Systematically substitute the letters from each option into the blanks.
For each resulting series, check if it can be divided into identical, repeating blocks (e.g., 'xyz-xyz-xyz').
The option that creates a consistent and logical repeating pattern is the correct answer.

Concept Tested & Keywords

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Practise the full RRB Staff Nurse Ahmedabad-2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.