Visual IQ puzzle (MENSA Norway, difficulty 3)
Correct answer: E
Explanation: This is an addition puzzle. There are 4 positions an 3 different possible shapes(square dot or nothing). Consider each row from left-to-right or each column from top-to-bottom. The third image is obtained by adding the objects in each position by following these rules: dot + dot = square, dot + square = nothing, nothing + square = square, nothing + dot = dot, square + square = dot