First you take the bottom left corner and top corner and add them together. Take the sum of that number and multiple by the bottom right corner to get the big number in the center. Like this:
3+8 = 11, 11 x 4 = 44
9+7 = 16, 16 x 2 = 32
8+7 = 15, 15 x 5 = 75
The missing number is 5
RE: Daily quiz #011 - what number should replace the question mark