3x tables

Quiz yourself by guessing what should be in each of the black rectangles below before clicking on it to display the answer.
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problem
answer
1*3   3  
2*3   6  
3*3   9  
4*3   12  
5*3   15  
6*3   18  
7*3   21  
8*3   24  
9*3   27  
10*3   30  
11*3   33  
12*3   36  
3*1   3  
3*2   6  
3*3   9  
3*4   12  
3*5   15  
3*6   18  
3*7   21  
3*8   24  
3*9   27  
3*10   30  
3*11   33  
3*12   36  


   

 
 

 
 

 

 
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