Rajaa
Hakutulokset: 9780486789569
Rajaa
yksi hakutulos.
100 Geometric Games
nidottu,
2015,
englanti,
ISBN 9780486789569
There are three loops in a tangle of rope. How many are independent, and how many are interlocked?Two knights stand on a chessboard. How many other knights must you add so that …