The Questions You Cannot Guess
Almost every question you practise has a 25% floor under it. Some papers take that away: 370 questions here want a number typed in, and 230 want a set of options rather than one.
Everything most candidates know about guessing assumes four options and one right answer. That assumption holds for 35,444 of the 36,737 questions published on this site, so it is a fair default. The exceptions are the ones worth knowing about in advance, because they do not just lower your odds. They remove the floor that all the usual advice stands on. A question that wants a number typed into a box has no options to eliminate and no chance of a lucky hit, and a question that wants a set of options rather than one punishes a half-right answer in a way a single-correct question never does.
- 370 questions here take a typed number across fourteen exams, where a blind guess is worth nothing at all.
- 230 are multi-select, where the exact set has to match: a random pick from the 15 possible sets lands about 7% of the time.
- 167 of those 230 carry partial marking, which rewards ticking only what you are sure of and zeroes the question for one wrong tick.
- 693 questions offer five options rather than four, which drops a blind guess to 20% and lands exactly on the break-even of the commonest penalty here.
What a blind guess is worth, by answer type
| Answer type | Questions here | A blind guess returns | What changes |
|---|---|---|---|
| Four options, one correct | 35,444 | 25% | The usual case, and the one all the standard advice is written for |
| Five options, one correct | 693 | 20% | Level with the 20% break-even of a quarter penalty, so a blind guess stops paying |
| Multi-select, four options | 230 | about 7% | The whole set has to match, and partial marking changes the decision rather than softening it |
| Typed number | 370 | nothing | No options, nothing to eliminate, and rounding to the wrong precision marks a correct method wrong |
A typed number removes every shortcut at once
370 questions on this site ask for a number in a box, across fourteen exams including JEE Advanced, MET, IIT JAM and GATE. Every habit from a four-option paper stops working on them at once. There is nothing to eliminate, no option to work backwards from, and no partial credit for being close. Candidates who are used to substituting each option into the equation lose their main method, because there is nothing to substitute. The arithmetic of guessing also collapses: a wrong number and a blank answer differ only by the penalty, so on a paper that deducts for wrong answers there is no reason to type a number you have not worked out.
The part that costs marks on questions people got right
Precision. The answer is compared as a number, so trailing zeros are harmless, and a figure rounded to a different precision from the one the paper asked for is simply wrong. Of the numerical questions here, 127 want an integer and 83 want two decimal places. Rounding 2.47 to 2.5 on a question that wanted two places loses the mark after all the work is done, which is the most annoying way to lose one. Read the instruction on the question rather than assuming the convention carries over from the last section.
A wrong number and a blank answer differ only by the penalty, so there is no reason to type a number you have not worked out.
Multi-select asks for a decision, not an answer
A multi-select question gives four options and more than one is correct. Every one of the 230 here has four options, and 166 of them have three correct, so the commonest shape is three right and one wrong. Full marks need the exact set. There are 15 sets you could submit, which puts a blind guess at about 7%, and that figure is the least interesting thing about these questions. What matters is the partial-marking rule, which turns the question into a bet you get to size.
How partial marking actually pays on this site
- Tick every correct option and nothing else, and you get the full marks. 167 of the 230 multi-select questions here go further and pay for a correct-only subset.
- Tick two of the three correct options and nothing wrong, and you keep part of the marks. On 87 of them that is a mark per correct option ticked, the JEE Advanced convention; on 80 it is a proportional share of the question's marks, which is the WBJEE rule.
- Tick one option that is wrong and the question is wrong however many correct ones you also ticked, with the full penalty. There is no credit for being mostly right once a wrong tick is in.
- So the rule that follows is narrow and reliable: select what you are sure of and stop. Adding a fourth option you are unsure about risks everything you have already earned on that question.
Five options is the quiet one
693 questions here offer five options, and the change looks small until you put it against the penalty. A blind four-option guess returns 25% against a 20% break-even on the commonest scheme published here, which is comfortably worth taking. A blind five-option guess returns 20%, which is exactly that break-even, so it gains and loses nothing across a long paper. Eliminating one option still fixes that, and it has to be one more elimination than you were used to. How to rule out an option covers where to find it.
Why this catches people out
None of this is hidden. It is in the notification, and it is on the screen during the test. It catches people out because answer type is the one thing nobody checks when they pick practice material. A candidate can take a dozen mocks for a paper that sets numerical-entry questions and never meet one, then lose the first four minutes of the real exam working out what the keypad does. The format is not difficult. Meeting it for the first time under a countdown is.
What to check before the day
Find the answer types your paper sets, and attempt at least a few of each under time. The official notification states them, each pattern page here states them for the papers it covers, and the practice tests use the same entry mechanics as the question type they are modelling. Two sittings is usually enough to make the mechanics automatic, which is all you need; the arithmetic above is what you want settled in advance rather than worked out in the hall.
The break-even figures come from each paper's own official scheme, and understanding negative marking has the working for all of them. What one question is worth covers the other half of the arithmetic, which is how much a single question moves your score. The papers that set these answer types are in the exam directory.
Put the strategy into practice
Choose a checked mock test and apply what you learned while the idea is fresh.
Frequently asked questions
What is a numerical answer type question?
A question that asks you to type a number instead of choosing an option. There is nothing to eliminate and no chance of a lucky hit, so partial knowledge pays nothing and a guess is worth nothing. On this site 370 questions work this way, across fourteen exams. Watch the required precision: 127 of them want an integer and 83 want two decimal places, and a correct method rounded wrongly scores zero.
How is a multiple-select question marked?
Full marks need the exact set of correct options and nothing else. Where partial marking applies, a selection that contains only correct options but not all of them keeps part of the marks, either a mark per correct option ticked or a proportional share of the question's marks depending on the exam. One wrong option makes the whole question wrong at the full penalty, however many correct ones you also ticked. On this site 167 of 230 multi-select questions carry partial marking.
Should I guess on a multiple-select question?
Not as a whole set. A random pick from the 15 possible sets is right about 7% of the time, which is far below any break-even. Where partial marking applies the better move is to tick only the options you are confident about and stop, since a correct-only subset keeps part of the marks and one wrong tick loses all of them plus the penalty.
Does having five options instead of four change my guessing strategy?
It changes the margin rather than the method. A blind four-option guess returns 25% against the 20% break-even of the commonest penalty here, so it pays. A blind five-option guess returns 20%, which sits exactly on that line and gains nothing over a long paper. Eliminating one option still puts you clear, so the effect is that you need one more elimination than on a four-option paper.