Series questions are usually presented as a line of 5 symbols. Working left to right, then right to left scan the symbols to observe similarities and differences between them.
You need to look at the elements of the symbols in relation to outlines, shading, line thickness, orientation (i.e. which direction the symbol is ‘pointing’), size, and position in relation to other parts of the main symbol. The number of each of these elements is important too.
In fact, you need to observe all the usual NVR suspects!
What observations do we notice about these usual suspects in example 1?
What logical steps can we make when we apply these observations to find the missing shape?
More than one element of the symbols can alter as in this next example.
What observations do we notice about these usual suspects in this example?
What logical steps can we make when we apply these observations to the task of finding the missing one in the series?
This leads us to the answer b