The problem with m/c tests are that the test taker is given the question and the answer on the paper. So, the other 'answers' are called detractors. As the name suggests, they are there to detract, or distract, you from the 'right' answer. They have to be logically close to the 'right' answer but not 'as correct'. (you can reference our earlier discussions on 'right answers). Normally there is at least one detractor you can eliminate as being totally of base because it is not like the others.
Do calming exercises such as deep breathing and muscle relaxation. Talk yourself through the anxiety. Take a sweater along in case the room is cold. Sit away from friends during the exam.
When a test is handed out, jot down formulae, equations, and rules that you want to remember. Take a deep breath, relax, and begin.
Answer the questions you know, if a paper/pencil test, skip those you don't know the answer immediately, mark your first guess in the margins of the question booklet. If a computer test, you don't get that option, so use these tips as you come across questions you are unsure of. Paper/pencil takers, come back to those you skipped and:
Eliminate the choices that you know are incorrect.
Eliminate choices that are grammatically different than the question (question in past tense-answer in present, question asks in plural-answer in singular)
When two of the four choices are opposites, pick one of those two as the best guess.
Avoid pairs. If Q-28 is known to be 'C', avoid guessing 'C' in 27 or 29.
Non-answers ("Zero", "none of the above") are usually poor guesses. (standard practice is to avoid these type of answers, and they are used when only two detractors can be thought of.)
In questions asking for the most or the least, pick the answer next to the most or least (Most- 5, 8, 9, --15<---, 30.)
"all of the above" is generally a good guess (standard practice is to avoid these type of answers, so they are used more often when the answer IS all of the above)
The longest answer is a good guess.
If two of four choices are almost identical, pick the longest of the two.
If a few questions have five choices instead of four, pick number 4 or 'd'.
When general terms are used (most, some, usually, could, might, etc) true is usually the best answer.
Exaggerated or complex answers are generally false.
If you don't have time to work anything out, make guess-timates and find an answer close to your approximation.
I hope this helps, and also shows why Multiple Choice tests are suspect.
Answers quite often pop up in other questions; keep that in mind.
First impressions are often best. If an answer comes to you from 'out of the blue', its probably your right brain at work. Don't fight this intuition unless you're sure it's wrong.
When a question is difficult to visualize, draw it.