Can you solve this number puzzle - which number replaces the question mark?

Question

Answer 1

9 the logic is ADD TO THE LARGEST DIFFERENCE OF OTHER TWO
9+(7-4)=12
4+(1-1)=4
similarly
6+(5-2)=9

Answer 2

The logic is "Add left corner number of triangle to difference of other/remaining corner numbers".

Comments

yes sir this  is the logic i used

Answer 3

9
(6+5)-2 = 9