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Archive for the ‘The thinking box’ Category

Pay with Haha, Aha and Ah

Posted in The thinking box, tagged on January 28, 2008 | Leave a Comment »

In the country of Prime Number, there are only three coins named: Haha, Aha and Ah. Their values are 5, 7 and 13. It is clear that small amount like 1,3 ,5 can not be paid in Prime Number. But what is the biggest amount that cannot be paid with the three coins ????

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What is the thinking box?

Posted in The thinking box, tagged on January 28, 2008 | Leave a Comment »

It’s one of my favorite books. This book contains several problems/puzzles about science, math and logic. It’s more for a nerd, I know that LOL. But as this book is kind of rare, I would like to share. I hope some people will find it fun like I do.  

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