Puzzle 17
Student Accommodationall logic puzzles
Alex, Bret, Chris, Derek, Eddie, Fred, Greg, Harold, and John are nine students who live in a three-storey building, with three rooms on each floor. A room in the West wing, one in the centre, and one in the East wing. If you look directly at the building, the left side is West and the right side is East. Each student is assigned exactly one room. Can you find where each of their rooms is:
Harold does not live on the bottom floor.
Fred lives directly above John and directly next to Bret (who lives in the West wing).
Eddie lives in the East wing and one floor higher than Fred.
Derek lives directly above Fred.
Greg lives directly above Chris.
Puzzle Copyright © Chris Joh
Puzzle 18
Take away eight of the sticks below, and leave one stick behind.
There are no hidden sticks.

Note: this puzzle is not interactive, and cannot be clicked.
Puzzle Copyright © Lloyd King
Puzzle 19
What number comes next in this sequence:
1 · 4 · 1 · 5 · 9 · 2 · ?
Puzzle 20
This BrainBashers safe has a rather unusual control panel.
In order to open the safe, you have to press every single square once only, in the correct sequence, ending on the square marked E.
Each square indicates which square to press next, for example, 2U means move up 2 squares and 3R means move right 3 squares.
Can you determine which square you must start with?
| 1D | 6D | 2R | 3R | 3L | 5D | 1L |
| 1R | E | 1U | 3R | 1R | 3L | 2D |
| 2U | 1D | 2L | 2U | 1L | 2D | 1L |
| 2D | 2R | 1D | 3L | 2U | 3L | 1D |
| 1R | 1D | 2R | 2D | 1L | 2D | 1D |
| 3R | 1R | 3U | 4U | 2U | 1L | 1D |
| 2U | 1R | 2L | 1R | 4U | 3U | 4U |
Note: this puzzle is not interactive, and the safe buttons cannot be clicked.