I think it's either:
7. Multiply the two numbers on the right side. Ex: 7 x 3 = 21(top right ) 2 x 3= 6 (bottom right) 9 x 6= 54(top left) 4 x 6 =24(bottom left).
If the grid is on top, you subtract the numbers on the left side so it will create number that is divisible to the number we produced on the right. If the grid if on the bottom, the you add the numbers on the left side so it will be divisible to the number we produced on the right.
4-1=3. 3 is divisible to 21(top right) 3-1=2. 2 is divisible to 54(top left) 2+4= 6. 6 is divisible to 6(bottom right) 6+0=6. 6 is divisible to 24(bottom left)
we'll assume that the middle grid follows the same rule as the bottom grids. 4+3=7. So that means the question mark has to be 7 to make the rule possible. 7 x 3= 21. 7 can be divided into 21
I came here today with the hope that you guys would have a much better reasoning.
This puzzle was dusted off from the "very" boujee dating site known as iqcatch.com