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whats 9+10?

 Nov 18, 2015

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21 b/c 9=3*3 and 10=5*2, so 3*2=6 and 3*5=15, 15+6=21 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THAT IS SO OLD

 Nov 18, 2015

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