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Key90

Brain food puzzles

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Key90 puzzles.

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The best brain food puzzle I have ever seen is the one that appears in the Sydney Morning Herald from Australia.

They call it Unisol. Its has better construction than any other numerical puzzle I have ever seen. They have been running them for over 20 years now and they are as popular as ever.

Key90.com has a few sample puzzles if you are not familiar with this puzzle. Get it in your favourite news papers by asking your editors to have a look at this puzzle.
February 2014
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