Henry Ernest Dudeney/Modern Puzzles/174 - Swastika Magic Square/Solution
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Modern Puzzles by Henry Ernest Dudeney: $174$
- Swastika Magic Square
- It is a magic square, the rows, columns, and two diagonals all adding up to $65$,
- and all prime numbers that occur between $1$ and $25$
- (viz. $1$, $2$, $3$, $5$, $7$, $11$, $13$, $17$, $19$, $23$)
- are to be found in the swastika except $11$.
- "This number," he says, "in occult lore is ominous and is associated with the eleven Curses of Ebal,
- so it is just as well it does not come into this potent charm of good fortune."
- He is clearly under the impression that $11$ cannot be got into the swastika with the other primes.
- But in this he is wrong, and the reader may like to try to reconstruct the square
- so that the swastika contains all the prime numbers
- and yet forms a correct magic square, for it is quite possible.
Solution
Sources
- 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Solutions: $174$. -- Swastika Magic Square
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Ansers: $387$. Swastika Magic Square