brain academy for math challenges :  for brighter minds / 
by Charlotte Haggis. 
 - UK:  Belle Wallace,  2004. 
 - 47 p.:  ill.;  28 cm. 
<br/><br/><label>ISBN: </label>9781846809026 
<br/><br/><label>Dewey Class. No.: </label>510  / MAT 2004