Puzzle 41
Which of the shapes is identical to the first one?
There might be more than one.
Puzzle Copyright © Robert A. Hartmann
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Puzzle 42
What day would tomorrow be if...
...yesterday was five days before the day after Sunday's tomorrow?
Puzzle Copyright © Kevin Stone
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Puzzle 43
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?
| 4R | 4D | 1R | 1D | 2D | 4L | 1D |
| 1R | 4D | 5D | 2R | 2D | 1L | 4L |
| 2R | 1D | 1L | 2R | 2R | 2D | 2U |
| 2R | 2R | 3U | 3D | 1R | 3U | 6L |
| 3U | 3R | 1D | 2U | 4L | 2D | 3L |
| 3U | 1L | 1R | 1R | 1R | 1R | 2U |
| 6U | E | 2U | 2L | 4L | 1L | 2U |
Note: this puzzle is not interactive, and the safe buttons cannot be clicked.
Puzzle Copyright © Kevin Stone
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Puzzle 44
Imagine a bottle recycling skip, empty other than one lonely bottle.
Every hour, on the hour, people come and put bottles into the skip.
The first hour, at noon, one person came and put a bottle in.
One hour later, two people each placed a bottle into the skip.
An hour later, four people each placed a bottle into the skip.
This doubling of people continued until 11pm, when the skip was finally full.
When was the skip exactly half full?
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