Puzzle 1
As oou oan oee, oy poinoer oepoacos eoero thord oetoer oito tho leoteo 'o'.
How mony oifoeront oetoero haoe boen oepoacod?
Puzzle Copyright © Kevin Stone
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Hint
Something's wrong with the letter O, and the word 'oifoeront' is important to the answer.
Answer
15 different letters: acdefhilmrstvwy.
Reasoning
The sentences should read:
As you can see, my printer replaces every third letter with the letter 'o'.
How many different letters have been replaced?
Puzzle 2
Using a tap, a container of 9 litres and a container of 4 litres …
… can you measure 6 litres?
Puzzle Copyright © Kevin Stone
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Hint
Fill the 9-litre container first.
Answer
Here are the contents of the containers after each stage:
A = 9 litres, B = 4 litres
A B
9 0 fill A
5 4 fill B from A (leaving 5 litres in A)
5 0 empty B
1 4 fill B from A (leaving 1 litre in A)
1 0 empty B
0 1 fill B from A
9 1 fill A
6 4 fill B from A (only 3 more litres fit in B)
6 0 empty B
This leaves 6 litres in container A.
Puzzle 3
Which letters come next in this sequence:
NE · US · RN · ER · RS · ?
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Answer
TH.
The last two letters of the planets in reverse order from the sun.
Puzzle 4
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?
2R
2R
4D
2D
1R
2D
E
2R
1U
3R
2D
1U
4L
3L
1U
1R
4R
2D
1U
2D
2U
3U
5R
2D
3L
1U
3L
2U
2D
2U
2L
2L
1U
2D
1D
3U
2R
1D
2R
1U
2U
6L
6R
3U
2R
2L
1U
2L
2U
Note: this puzzle is not interactive, and the safe buttons cannot be clicked.
Puzzle Copyright © Kevin Stone
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answer
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Hint
Start on any square, and see how far you can get.
Answer
Start from the 2R on the sixth row down and the second column across.
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