The worked question on this page is original educational practice. It is not represented as a question from an official previous-year examination paper.
01 / UNDERSTANDING
Review the question
Write an original four-entry machine question with all operations stated, then remove the statement only after generating enough steps to infer it. A new input should include a smaller value away from either end. An original checkpoint is: Under the stated machine rule, what is step three? Supported answer: 8, 15, 31, 42. Explain the decisive fact, then alter one condition and solve again. This is an original practice method, not a claim that the question appeared in an official past paper.
02 / UNDERSTANDING
The concept in context
One observed movement can fit several rules. Prefer the simplest rule supported by all displayed transitions, and keep provisional assumptions separate from demonstrated operations. A useful study check is to mark the prefix or suffix fixed after each displayed step, then reapply the verified operation to a new mixed sequence. Explain why the method fits the stated facts before applying it to a changed situation.
03 / UNDERSTANDING
A worked learning case
An invented machine repeatedly moves the smallest remaining number to the next unfilled position on the left, preserving the relative order of other entries. For input 42, 15, 31, 8, step one is 8, 42, 15, 31. Step two becomes 8, 15, 42, 31. The final placement sorts the remaining pair.
ORIGINAL EDUCATIONAL PRACTICE
Try it before you check.
Under the stated machine rule, what is step three?
Show the answer and reasoning
8, 15, 31, 42.
After two steps, 8 and 15 are fixed. Of the remaining values, 31 is smaller than 42, so it moves into the third position while 42 shifts right. The operation fixes one additional position; it does not apply an unrelated swap rule to the entire sequence.
Two traps to watch for.
- Inferring alphabetical priority from only one moved word.
- Counting an unchanged display as a required extra transformation.
YOUR TOPIC-SPECIFIC LEARNING MAP
Learn from the attempt
Mark the prefix or suffix fixed after each displayed step.
Test the tentative rule on every transition before proceeding.
Reapply the verified operation to a new mixed sequence.
Explain the idea, apply it to a new situation, then check what changed in your reasoning.
BANKERS TUTORIAL · SOURCE NOTES
Keep the source alongside your notes.
Official links provide subject context and authoritative reference material. This guide’s explanation, scenario and question are original Bankers Tutorial learning content.
- www.ibps.in https://www.ibps.in/wp-content/uploads/Detailed-Notification_CRP-PO-XIV_7.8.24.pdf
For IBPS & RRB preparation, check the current official notice before relying on changing dates, rules or examination requirements.
