Around here those tests seems to be careful to avoid maths, memory etc and only try to test your ability to recognize patterns or find missing solutions.
I was required to do mental calculation during the WAIS-IV I did.
I also think they try to introduce elements that makes it hard to prepare for the test.
That said if someone has never taken one of these then getting used to how the test works and doing a sample test could help them get a better score right away.