What number should replace the question mark

Question

Answer 1

The answer is 35!! Here how is it works:

45/5=9
24/3=8
28/4=7

First triangle is 987

16/4=4
18/3=6
15/5=3

Second triangle is 364

20/4=5
9/3=3
?/5=7 -> 35

Third triangle is 735

Answer 2

35 nkrajput30@gmail.com divide 45/5=9, 24/3=8,28/4=7 we get the center figure