Mental maths 

 - 1st ed 
 - New Delhi  Sterling Publishers  2007 
 - 64 p. : col. : ill 
<br/><br/><label>ISBN: </label>9781845576875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>372.7 MEN