Answer / brijesh

Its simple...

15*3+5= 50

So,

18*3+5= 59

Answer / wareagle

If first number is x, second number is
3 (x+2) - 1

3(15+2)-1= 50
3(18+2)-1= 59

My first answer was incorrect

Answer / wareagle

I think 59 is incorrect.
15:50 : : 18 :?
3x5:10:5 :3x6:10x6=18:60
15:50 : 18:60

Answer / k.k

15/50=.3& 18/59=.3 therefore 59 is correct

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