Tyagi, Praveen  _ <br/><br/>
Secrets behind faster calculations  train your brain to become a human calculator 

 - New Delhi  GKP  2024 
 -  PB  18cm.  152p. 
<br/><br/><label>ISBN: </label>9789392837777 
<br/><br/><label>Subjects--Personal Names: </label>   _ 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Secrets behind faster calculations<br/>Calculation
<br/><br/><label>Dewey Class. No.: </label>515  / TYA