Bills, Chris. <br/><br/>
Eight days a week :  puzzles, problems and questions to activate the mind / 
by Vhris Bills. 
 - Derby :  Associatin of Teachers of Mathematics,  2001. 
 - 58 p. : ;  16 cm. 
<br/><br/><label>ISBN: </label>1898611092 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.<br/>Mathematics--Study and teaching.