Math tests :  challenge your numerical powers with Mensa-derived challenges  

 - 114 pages :  color illustrations ;  23 cm 
<br/><br/> Primary 
<br/><br/><label>ISBN: </label>9781780975177 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations
<br/><br/><label>Dewey Class. No.: </label>793.74