Two numbers are treated as friends,when certain operations performed on one number result in the other and viceversa.
Example 16 and 13.
When the number 16 is squared and the digits in the result are added up,you get 13.viz 16*16=256.and
2+5+6=13
Same procedure with 13...13*13=169...1+6+9=16 as mentioned by me
There are several other cases of such friendships which I will deal with later on
Example 16 and 13.
When the number 16 is squared and the digits in the result are added up,you get 13.viz 16*16=256.and
2+5+6=13
Same procedure with 13...13*13=169...1+6+9=16 as mentioned by me
There are several other cases of such friendships which I will deal with later on
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