Mullins, Roy. <br/><br/>
The number puzzles / 
by Roy Mullins. 
 - St Albans, Herts :  Tarquin,  2008. 
 - 55 p. :  25 cm. 
<br/><br/><label>ISBN: </label>1899618473 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.<br/>Number games.