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Dudeney's Amusements @dudeney_puzzles@mathstodon.xyz

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the four shall add up to a different sum. There will, of course, be four cards in the reduced pack that will not be used. These four may be any that you choose. It is not a difficult puzzle, but requires just a little thought. (2/2)

405. CARD MAGIC SQUARES. Take an ordinary pack of cards and throw out the twelve court cards. Now, with nine of the remainder (different suits are of no consequence) form the above magic square. It will be seen that the pips add up fifteen in every row in every column, and in each of the two long diagonals. The puzzle is with the remaining cards (without disturbing this arrangement) to form three more such magic squares, so that each of (1/2)

SOLUTION TO 356. QUEER CHESS. (2/2) Show more

SOLUTION TO 356. QUEER CHESS. (1/2) Show more

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would be a sufficient reason for my not doing so. (2/2)

356. QUEER CHESS. Can you place two White rooks and a White knight on the board so that the Black king (who must be on one of the four squares in the middle of the board) shall be in check with no possible move open to him? "In other words," the reader will say, "the king is to be shown checkmated."
Well, you can use the term if you wish, though I intentionally do not employ it myself. The mere fact that there is no White king on the board (1/2)

SOLUTION TO 309. THE FORTY-NINE COUNTERS. Show more

309. THE FORTY-NINE COUNTERS. Can you rearrange the above forty-nine counters in a square so that no letter, and also no number, shall be in line with a similar one,
vertically, horizontally, or diagonally? Here I, of course, mean in the lines parallel with the diagonals, in the chessboard sense.

SOLUTION TO 286. PAINTING THE DIE. Show more

286. PAINTING THE DIE. In how many different ways may the numbers on a single die be marked,
with the only condition that the 1 and 6, the 2 and 5, and the 3 and 4 must be on opposite sides? It is a simple enough question, and yet it will puzzle a good many people.

SOLUTION TO 255. THE LEVEL PUZZLE. (3/3) Show more

SOLUTION TO 255. THE LEVEL PUZZLE. (2/3) Show more

SOLUTION TO 255. THE LEVEL PUZZLE. (1/3) Show more

SOLUTION TO 341. THE FOUR FROGS. (7/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (6/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (5/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (4/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (3/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (2/7) Show more

SOLUTION TO 341. THE FOUR FROGS. (1/7) Show more