Lesson 2 of 3 · DS on ordering, seating and directions
Seating floors
Data Sufficiency · for IPMAT Indore, IPMAT Rohtak and JIPMAT
The exam method
- Seating. fix the most constrained person first (an end, a corner, a known floor), then test the rest.
Worked examples
Example 4Typical
Nine people in a row facing north: who is in the middle? I: E third from the right; two people between E and D; S at a corner with B second to his right. II: G second from the left; one person between D and G; J next to D.
Solution: both. I: D 4th, S 1st, B 3rd. II: D 4th, J 3rd or 5th. Together J is 5th, the middle.
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