Students between two positions — Aptitude Question
Students between two positions: In a row, Ravi is 8th from the left and Suresh is 15th from the left. Answer and worked solution on CodeKairo.
- Topic: Seating & Puzzles
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 45 seconds
Question
In a row, Ravi is 8th from the left and Suresh is 15th from the left. How many students sit between them?
Options
- 5
- 6
- 7
- 8
Show the answer and the worked solution
Correct answer: B. 6
Worked solution
- Difference = 15 − 8 = 7.
- Excluding both, the count between is 7 − 1 = 6.
Answer: 6.
The idea
Difference minus one gives the count strictly between. Including one endpoint gives 7.
Shortcut. Between positions p and q from the same end sit q − p − 1 people: 15 − 8 − 1 = 6. Listing them confirms it: 9th to 14th is six seats.
Common trap. 7 — taking the plain difference 15 − 8, which counts one of the two boys as well.