7.--_Clerk of Oxenford's Puzzle._

The illustration shows how the square is to be cut into four pieces, and

how these pieces are to be put together again to make a magic square. It

will be found that the four columns, four rows, and two long diagonals

now add up to 34 in every case.

[Illustration]

The Canterbury Puzzles, and Other Curious Problems · 第 158 / 286 题