The number puzzles /
Mullins, Roy.
The number puzzles / by Roy Mullins. - St Albans, Herts : Tarquin, 2008. - 55 p. : 25 cm.
1899618473
Mathematical recreations.
Number games.
The number puzzles / by Roy Mullins. - St Albans, Herts : Tarquin, 2008. - 55 p. : 25 cm.
1899618473
Mathematical recreations.
Number games.