Find the next term in the series: A3B, C7D, E11F, G15H, \ \ \ \ \ \ \ ? - RRB Staff Nurse Delhi-2015

RRB Staff Nurse Delhi-2015

Reasoning

Hard

Appeared in: RRB Staff Nurse Delhi-2015

Explanation

The series follows three independent patterns for the first letter, the number, and the last letter.
The first letter follows a +2 alphabetical progression (A, C, E, G, ...), making the next letter 'I'.
The number follows a +4 arithmetic progression (3, 7, 11, 15, ...), making the next number 19.
The last letter also follows a +2 alphabetical progression (B, D, F, H, ...), making the next letter 'J'.
Combining these three patterns gives the next term as I19J.

Option A: The number 20 is incorrect. The numerical pattern is an arithmetic progression with a common difference of 4 (15 + 4 = 19), not 5.
Option B: The last letter 'K' is incorrect. The pattern for the last letter is a consistent skip of one letter (+2 positions), so after 'H' comes 'J', not 'K'.
Option C: Both the first letter 'J' and the last letter 'K' are incorrect. The patterns are a consistent +2 progression, making the next letters 'I' and 'J' respectively.

Visual 1: Infographic - A flowchart breaking down the alphanumeric term 'A3B' into three separate streams: 'First Letter', 'Number', and 'Last Letter'. Each stream shows its respective pattern (+2, +4, +2) leading to the final combined term 'I19J'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Alphanumeric Series Pattern Recognition as background academic context rather than a clinical decision trigger.
This question tests logical reasoning and pattern recognition, which are fundamental cognitive skills.
In nursing, these skills are crucial for interpreting trends in patient vital signs, recognizing patterns in symptoms, and making quick, logical decisions during patient care.
What if the series was A3B, D7E, G11H? The pattern would change. The letters would be progressing by +3 positions (A->D, D->G), and the number would still be +4. The next term would be J15K.

How to Approach the Question

First, recognize that the question asks to find the next term in a series of alphanumeric codes.
Break down each term into its components: the first letter, the number in the middle, and the last letter.
Analyze the pattern for each component separately. Look for arithmetic or geometric progressions for numbers, and consistent jumps (e.g., every other letter, every third letter) for alphabets.
For the first letters (A, C, E, G), identify the pattern is skipping one letter (+2 positions). Determine the next letter.
For the numbers (3, 7, 11, 15), identify the arithmetic progression (adding 4 each time). Calculate the next number.
For the last letters (B, D, F, H), identify the pattern is also skipping one letter (+2 positions). Determine the next letter.

Concept Tested & Keywords

QgE7KHdDpQikrITQC7VOKX