Puzzle 37
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?
| 6D | 6D | 1R | 1R | 1R | 1R | 1D |
| 2D | 1D | 1U | 2L | 1R | 2D | 2L |
| 2U | 4R | 1U | 3R | 2D | 5L | 2L |
| 1R | 3U | 1U | 2D | E | 2D | 3L |
| 3U | 1L | 1U | 2L | 2D | 2L | 1L |
| 1R | 3R | 1U | 3U | 2U | 1D | 2U |
| 1U | 2R | 1U | 5U | 2L | 1R | 2U |
Note: this puzzle is not interactive, and the safe buttons cannot be clicked.
Puzzle Copyright © Kevin Stone
www.brainbashers.com
Puzzle 38
Complete this grid with the digits 1 to 6 to make the sum correct.
Perform each mathematical operation in the order shown, from left to right, so 1 + 2 x 3 is treated as (1 + 2) x 3 = 9.
Consecutive numbers are not next to each other, there is no ÷ 1, and at no point is a decimal or a fraction used.

Note: this puzzle is not interactive, and the squares cannot be clicked.
Puzzle Copyright © Kevin Stone
www.brainbashers.com
Puzzle 39
Which of the shapes is identical to the first one?
There might be more than one.
Puzzle Copyright © Robert A. Hartmann
www.brainbashers.com
Puzzle 40
Start in the bottom left corner and move either up or right, one square at a time, using the numbers and the mathematical signs along the way. What is the largest total you can make?
| + | 2 | – | 4 | + | 2 |
| 2 | + | 2 | – | 2 | + |
| – | 1 | + | 3 | – | 3 |
| 2 | – | 3 | + | 1 | – |
| + | 1 | – | 3 | + | 2 |
| 3 | + | 3 | – | 2 | + |
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Kevin Stone
www.brainbashers.com