46 



KNOWLEDGE 



[Makch 2, 1891. 



The diagram on the left shows the Relative position of 

 complementary numbers, a line in each case running 

 fi-om one to the other. 



The remaining 11 types, with examples, are as fol- 

 lows : — 



1 7 16 10 



14 12 3 5 



11 13 6 4 



8 2 9 16 



8 5 12 9 



18 4 1 16 



3 14 15 2 



10 11 G 7 



