Mechanical Engineering Exam > Mechanical Engineering Notes > General Aptitude for GATE > Cheatsheet: Queues & Ranks
Cheatsheet: Queues & Ranks
Theory
- This is one of the relatively easier topics because this topic is independent of other topics. Hence, by learning a limited number of concepts, one can score well in questions related to this topic.
- Generally, positions of a few people standing in a queue are given and the candidate is asked to find the total number of people in the group or the position of a certain person with respect to another person.
Formula
- Number of people in the queue = Number of people ahead + 1 person under consideration + number of people behind
- If a person's position is x from start, there are x-1 people ahead of him
- If a person's position in a queue is x from the front and y from the last, then the total number of people in the queue is x+y-1.
- If a person A's rank from the front of the queue is x, a person B's rank from the back of the queue is y, and the number of people in the queue is p, then the number of people between A and B is equal to p-x-y.
Solved Example
Try yourself: If Ravi’s position in the queue is 19th from the front and 23rd from the back, find the number of people in the queue.MULTIPLE CHOICE QUESTION
Try yourself: In a class of 50 students, Sumit's rank from the top is 15 and Rohit's rank from the bottom is 30. How many people are between Sumit and Rohit?MULTIPLE CHOICE QUESTION
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Apr 30, 2026 Last updated
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