Class size from two ranks — Aptitude Question
Class size from two ranks: In a class, a student is 9th from the top and 26th from the bottom. Answer and worked solution on CodeKairo.
- Topic: Seating & Puzzles
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 45 seconds
Question
In a class, a student is 9th from the top and 26th from the bottom. How many students are in the class?
Options
- 33
- 34
- 35
- 36
Show the answer and the worked solution
Correct answer: B. 34
Worked solution
- Total = 9 + 26 − 1 = 34.
Answer: 34.
The idea
The student is counted in both ranks, so subtract one. Adding without the correction gives 35, the offered trap.
Shortcut. Count the others: 8 students rank above him and 25 below, so the class is 8 + 25 + 1 = 34.
Common trap. 35 — adding 9 and 26 directly, which counts the student himself twice.