Allen, Robert <br/><br/>
The ultimate mental challenge 

 - Great Britain 
 -  il. 
 - 1996 
<br/><br/> This is a serious test of your puzzle-solving abilities! The Mensa Puzzle Test contains more than 500 difficult puzzles of all descriptions. Whichever way you look at this book, it's big and crammed full of everybody's favourite type of Mensa puzzle. 
<br/><br/><label>ISBN: </label>9781858681160 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Puzzles<br/>Math