Question

how to make less silly mistakes in exam

Answer 1

first read the question carefully...
second carry ur water bottle with u, sometimes it just got messy and it starts tension

Answer 2

◇Read questions properly.
◇Take deep breaths.
◇Drink water to avoid hypertension.
◇In maths or in numericals whenever you're seeing a change of sign such as -or+ put all of your concentration there. It'll help you having a correct answer when the process is correct.