This is, quite simply, the best and most popular puzzle book ever published in the Soviet Union. Since its first appearance in 1956 there have been eight editions as well as translations from the original Russian into Ukrainian, Estonian, Lettish, and Lithuanian. Almost a millio…
A tangram "is a geometric dissection puzzle in which seven standard pieces (five triangles, one square, one rhomboid) are used to make images of various objects"--Page 4 of cover
AHow many cards do I have to deal before I know for certain that you have a straight? If two typists can type two pages in two minutes, how many typists will it take to type 18 pages? How many days are in five million seconds? If you think these are good questions, this is the b…
No skill at sleight of hand is needed to perform the more than 500 tricks described. Mathematics guarantees their success.
Traditional magic squares employ a chessboard-like arrangement of numbers in which the total of all rows, columns, and diagonals add up to the same number. This innovative approach by a Dutch engineer challenges puzzlists to think two dimensionally by replacing numbers with colo…
