What number should replace the question mark in the grid?

Question

Answer 1

2 is the answer
3*3 =9
4*2 = 8
5*1=5
2*3 =6
x*4=8

x=2

Answer is 2

Comments

But what about the addition above the middle row?

Answer 2

5+4=9 / 3 = 3
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6+2=8 / 4 = 2
Answer is 2

Answer 3

In first column, 5+4=9=3*3
Same logic applies for all columns
So 6+2=8=4*2
Ans is 2.