A lives on the lowermost floor.
D lives on the 6th floor.
J lives on the topmost floor.
| Floors | People |
| 10 | J |
| 9 | |
| 8 | |
| 7 | |
| 6 | D |
| 5 | |
| 4 | |
| 3 | |
| 2 | |
| 1 | A |
G lives on an odd numbered floor immediately below the one on which B lives.
Case I:
| Floors | People |
| 10 | J |
| 9 | |
| 8 | B |
| 7 | G |
| 6 | D |
| 5 | |
| 4 | |
| 3 | |
| 2 | |
| 1 | A |
Case II:
| Floors | People |
| 10 | J |
| 9 | |
| 8 | |
| 7 | |
| 6 | D |
| 5 | |
| 4 | B |
| 3 | G |
| 2 | |
| 1 | A |
There are only two floors between the ones on which C and I live.
Case I:
| Floors | People |
| 10 | J |
| 9 | |
| 8 | B |
| 7 | G |
| 6 | D |
| 5 | I/C |
| 4 | |
| 3 | |
| 2 | C/I |
| 1 | A |
Case IIA:
| Floors | People |
| 10 | J |
| 9 | |
| 8 | |
| 7 | |
| 6 | D |
| 5 | I/C |
| 4 | B |
| 3 | G |
| 2 | C/I |
| 1 | A |
Case IIB:
| Floors | People |
| 10 | J |
| 9 | |
| 8 | I/C |
| 7 | |
| 6 | D |
| 5 | C/I |
| 4 | B |
| 3 | G |
| 2 | |
| 1 | A |
E lives on a floor above F and both lives on odd numbered floors.
Case I:
| Floors | People |
| 10 | J |
| 9 | E |
| 8 | B |
| 7 | G |
| 6 | D |
| 5 | I/C |
| 4 | H |
| 3 | F |
| 2 | C/I |
| 1 | A |
Case IIA:
| Floors | People |
| 10 | J |
| 9 | E |
| 8 | H |
| 7 | F |
| 6 | D |
| 5 | I/C |
| 4 | B |
| 3 | G |
| 2 | C/I |
| 1 | A |
Case IIB:
| Floors | People |
| 10 | J |
| 9 | E |
| 8 | I/C |
| 7 | F |
| 6 | D |
| 5 | C/I |
| 4 | B |
| 3 | G |
| 2 | H |
| 1 | A |
H lives on a floor that is adjacent to the one on which I lives.
Therefore, Case IIA and Case IIB are not valid.
Case I:
| Floors | People |
| 10 | J |
| 9 | E |
| 8 | B |
| 7 | G |
| 6 | D |
| 5 | I |
| 4 | H |
| 3 | F |
| 2 | C |
| 1 | A |
There are three floors in between I and E.
Study Notes
Category
