Hi yangjipho,
When deciding whether to take the strongest or weakest section of the GMAT first, both approaches present unique advantages and potential drawbacks.
Starting with the strongest section can boost confidence early in the exam, potentially improving overall performance. This approach allows test-takers to capitalize on their strengths while their energy and focus are at their peak. However, this strategy might lead to receiving more difficult questions in the subsequent sections, increasing the risk of mistakes due to fatigue or pressure.
Conversely, beginning with the weakest section may help avoid the adverse effects of fatigue when tackling more challenging areas. Addressing the weakest section first ensures that test-takers are freshest and most alert for their most difficult questions.
So, at the end of the day, the best thing to do is practice with various section orders and see what is right for you.