Keep your mind fit number puzzles 

 - London  Carlton Books  2010 
 - 174 p. . : ill. ; 14 cm 
<br/><br/><label>ISBN: </label>9781847325341 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations
<br/><br/><label>Dewey Class. No.: </label>793.73 CAR