May 14th, 2018, 07:39 AM  #11  
Newbie Joined: Apr 2018 From: India Posts: 6 Thanks: 0  Quote:
This is the same thing explained in this video but in a better way  
May 14th, 2018, 09:07 AM  #12 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,486 Thanks: 950 
Define "better way".

May 14th, 2018, 10:27 AM  #13 
Senior Member Joined: Oct 2009 Posts: 611 Thanks: 188  

Tags 
number, short, system, trick 
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