Brain stretchers. 

 - London :  Reader's Digest,  2006. 
 - 399 p. :  ill. ;  29 cm. 
<br/><br/><label>ISBN: </label>0276441192 9780276441196 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational games.<br/>Intelligence tests.<br/>Mnemonics.<br/>Puzzles.