Colin James Physics - Logic puzzles.
Last updated: 25th June 2013.
Logic puzzles.
These are general logic puzzles - not Physics puzzles, but they should be challenging and fun (just like Physics).
If you know what you are looking for in a puzzle or have done a similar one before you may find an easier puzzle harder or a harder one straightforward.
So it its worth scanning through the different categories.
When you click on a puzzle it will appear below (and the screen will move down to show the puzzle) with a solution further down the screen.
Easier puzzles.
Running puzzle.
Tennis puzzle.
Water puzzle.
Walking puzzle.
Harder puzzles.
Spending puzzle.
Cakes puzzle.
Ages puzzle.
Chess puzzles.
Chess puzzle 1.
Chess puzzle 2.
Chess puzzle 3.
Chess puzzle 4.
Chess puzzle 5.
Water puzzle.
I have two containers. One contains a maximum of 4 litres and the other contains a maximum of 9 litres.
I also have a supply of as much water as I want.
I can only measure exactly 4 litres or exactly 9 litres - I can't estimate how much is in a container by measuring the depth of water.
There are no other containers to put measured water in.
The problem is 'How do I measure 6 litres of water with just the two containers?'
Solution
Solution
Solution
Solution
Solution: Water puzzle.
Instruction.
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4 litre container.
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9 litre container.
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Fill the 9 litre container.
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-
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9
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Pour 4 litres from the 9 litre container into the 4 litre container.
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4
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5
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Empty the 4 litre container.
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-
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5
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Pour 4 litres from the 9 litre container into the 4 litre container.
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4
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1
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Empty the 4 litre container.
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-
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1
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Pour the 1 litre from the 9 litre container into the 4 litre container.
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1
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-
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Fill the 9 litre container.
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1
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9
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Fill the 4 litre container to the brim from the 9 litre container leaving 6 litres in the 9 litre container.
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4
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6
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