LogiQuiz

About LogiQuiz

A self-referential quiz looks like an ordinary multiple-choice test, but every question is about the quiz itself: how many answers are B, what the answer to question 4 is, which other question shares this one's answer. No question can be settled alone, so you reason about the whole set until only one consistent pattern of answers is left. The format was made famous by Jim Propp's Self-Referential Aptitude Test.

LogiQuiz puts up a new pack every day, labelled with a number and the date (for example #38 for 2 October 2026). The pack contains six quizzes at rising difficulty, marked with one to six light bulbs. The easy ones have four questions with direct references; the harder ones add more questions, counting rules and tangled cross-references, and can take half an hour.

The interface helps you test ideas. Click a choice once to cross it out, twice to select it and a third time to clear it. Each question card turns green when your choice agrees with your other picks and red when it contradicts them, and undo and redo buttons let you back out of a wrong hypothesis. A Past Puzzles button opens earlier packs. There is no account and nothing to install.

It suits people who like pure deduction puzzles and want something different from grid logic, with a gentle way in for newcomers.

How to play LogiQuiz

1. Pick a difficulty level from the light-bulb tabs on today's pack.
2. Read every question first, since each one refers to the quiz's own answers.
3. Click a choice once to eliminate it, again to select it, and a third time to clear it; only one answer per question can be selected.
4. Watch the colours: a card turns green when its answer is consistent with your picks and red when it is not. The quiz is solved when every card is green.

Tips

• Start with questions that constrain themselves or have only one possible answer, then follow the ripple.
• Counting questions ('How many questions have answer A?') usually narrow things down fastest once a few answers are fixed.
• Use undo to test a hypothesis several steps deep and back out cleanly if it turns red.
• Begin at the easiest level to learn the format before trying the five- and six-bulb quizzes.

Questions