Seven

Seven are the gates of hell
Seven are the days of the week
Seven wise men of Greece
Seven the seas that cover the earth
Seven the planets, and seven
The wonders of the world

From THE MAN WHO COUNTED by Malba Tahan
Chapter 8: SEVENTH HEAVEN
Download: .pdf

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Seventh Heaven

21 identical casks of wine, of which 7 full, 7 half full, and 7 empty, are to be divided among three men. Each should receive the same amount of wine and the same number of casks, without opening them.

How to do this?

Mathematical excerpts from The Man Who Counted by Malba Tahan

Magic Squares

A beautiful learning puzzle from In Code: A Mathematical Journey

Here’s thekittycats story: The Magic Square, or Lo Shu

One for sorrow

One for sorrow,
Two for mirth,
Three for a wedding,
Four for birth,
Five for rich,
Six for poor,
Seven for a witch,
I can tell you no more.