Question

18:9 :: 78: ___ (1) 56 (2) 15 (3) 37 (4) 24

Answer 1

options are wrong:
see the explaination:-
18:9::78:x
18*x=9*78
18x=9*78
x=9*78/18
=78/2
=39

ans.= 18:9::78:39

Answer 2

Answer:

here

in 18 ,1+8=9:

likewise in 78,7+8=15.

thrrefore the answer is 15