Understand the penalty first
The notice of each exam states whether wrong answers carry a penalty and how large it is. A common arrangement deducts a fraction of a question's marks for each wrong answer, while unanswered questions carry no deduction. If there is no penalty, you should answer every question.
A simple probability idea
Suppose a question has four options and the penalty is one quarter of the marks. If you guess blindly, you win with probability one in four and lose with probability three in four. The expected gain is slightly below zero or around zero, so blind guessing does not help. If you can eliminate two options, your chance of success rises to one in two, and the expected gain becomes positive. That is the reason behind the rule many toppers use: guess only after eliminating at least two options.
Calibrate yourself with mocks
Use the mock tests to learn how reliable your instincts are. After each test, count three groups of questions: sure answers, informed guesses and blind guesses. Calculate accuracy for each group. If your informed guesses are right more than the break-even rate, keep making them. If they are not, tighten your rule.
Write the rule in advance
Decide your rule before the exam and write it where you can see it. For example: attempt if sure, attempt if two options are eliminated, skip otherwise. Under stress, people either guess everything or skip everything, so a written rule prevents drift.
The order of attempts
First pass: answer questions you are sure of.
Second pass: informed guesses where you could remove options.
Last minutes: reconsider skipped questions only if the penalty is small and you can eliminate an option.
Elimination techniques
In arithmetic, check whether the answer must be an integer, odd or even, or within a plausible range.
In English, eliminate options with grammatical errors or those that change the meaning of the passage.
In reasoning, check the options against any condition that must hold.
Do not carry an emotional load
A wrong guess is a small price. Move on and avoid chasing the lost mark by taking larger risks. Regular practice with a clear rule makes the process automatic.
When there is no penalty
If the notice says there is no negative marking, answer every question and leave time at the end to fill all unanswered ones. A blank answer is the only guaranteed zero.
A worked calculation
Take an exam where each question is worth two marks and a wrong answer loses half a mark. Break-even happens when the chance of being correct times two equals the chance of being wrong times half a mark. That gives a break-even probability of 20 percent. With four options, a blind guess gives 25 percent, so it is slightly positive on paper, but real exam stress and imperfect elimination make people overestimate their odds. This is why a test of your own accuracy in mocks matters more than the textbook figure.
Check the exact penalty each time
Penalties differ across recruitment bodies and even across stages of the same exam. A preliminary may deduct one quarter of the marks, another paper may deduct one third, and some papers carry none. Read the instruction page on the day as well, and adjust your rule if it differs from your mock tests.
A note on sources
This is general preparation guidance written by the ExamPragati editorial team. It is not a recruitment notification. Pattern, eligibility and dates differ between exams and years, so confirm them in the current official notice before you plan your calendar.
