Challenging mathematics :  a selection of secondary school mathematics problems / 
edited by Peter Gilblin and Ian Porteous 
 - Oxford :  Mathematical Education on Merseyside,  c1990 
 - 96p. :  ill. ;  30cm 
<br/><br/><label>ISBN: </label>0199143617 9780199143610 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / CHA