Picture Riddle: Find the Missing Number From the Given Hints

The logic behind the resulting numbers is that, it is the product of multiplication between the black boxes and the white boxes.

So in the first figure you have 4 white boxes and 5 black boxes;

So 5 x 4 = 20.

In the second figure we have;

Black boxes = 7 &

White boxes = 2.

7 x 2 = 14.

Similarly in 3rd figure we have;

Black boxes = 4 &

White boxes = 5.

4 x 5 = 20

So we can find the missing number in the last figure as;

Black boxes = 3 &

White boxes = 6.

6 x 3 = 18

Answer = 18