Whole Group

Rated 4.75(4) — Whole Group

English 16 a very nice puzzle invented in 1900 by the American Sam Loyd, also described as the greatest inventor of puzzles by Martin Gardner.The goal of that game is to transpose the positions of the gold and silver coins in the minimum possible number..

Rated 3.30(10) — Whole Group

The earliest known references to the Knight's Tour problem date back to the 9th century. The Knight's Tour is a mathematical problem involving a knight on a chessboard. The knight is placed on the empty board and, moving according to the rules of chess...

Rated 4.00(1) — Whole Group

The software is designed to study the pronunciation of letters in the English alphabet. It will be helpful for for foreigners learning the English language.