Singh, Rajesh <br/><br/>
Goodwill's skills builders challenging math problems / 
by Rajesh Singh 
 - New Delhi, India :  Goodwill Publishing House,  [2015] 
 - 258 pages ;  28 cm 
<br/><br/><label>ISBN: </label>9788172454715 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc
<br/><br/><label>LC Class. No.: </label>QA 139  / .S56 [2015]