How do you know everything you need to for Gamsat?

Gamsat can seem really overwhelming especially if it has been a while since you have studied the our sciences. But there are a number of techniques you can use that will help you with the test. For example, some questions which can seem very complicated can actually just involve pattern recognition and some that seem to need large amounts of long mental arithmetic actually use powers so there is a much quicker shortcut.
Shall we go through some questions you have been finding challenging and take it from there?