Choose which one of the pictures is most unlike the other four.
Go from left to right and look for similarities between each figure, e.g. shapes, position of the shapes to one another, colour and shading or patterns, manipulations like increasing or decreasing in size or number, etc. Once you have found how the figures are alike, see if there is one aspect that is the same in only four of the figures, leaving one figure that is different from the rest.
Example Question 1:
Example Question 2:
Question 1: c, Question 2: a