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Free Logic quiz: 113 trivia questions and answers — riddles & brain teasers. Easy to hard, with explained answers. No sign-up.
Start this quiz →🖨️ Printable version (20 questions + answers)
Classic riddles, number sequences to deduce, visual logic grids and pure reasoning problems: this quiz brings together puzzles of many different styles. A fun way to exercise your thinking.
This quiz currently has 113 questions, ranging from easy to hard, available in French, English and Spanish when the Spanish translation is available.
Warm up before the quiz with these 20 trivia questions and their explained answers: click a question to reveal the answer.
Answer: B. In this sequence, the top number decreases by 1 each step (3 -> 2 -> 1 -> 0) and the bottom number increases by 2 (3 -> 5 -> 0 -> 2).
Answer: your first cousin once removed. Your father's brother is your uncle; that uncle's daughter is your cousin; and her son is your first cousin once removed.
Answer: It doesn't fall. Roosters don't lay eggs — only hens do. So there is no egg at all.
Answer: MOON. The Moon is a natural satellite of the Earth, not a planet. All the others are planets of the solar system.
Answer: U. It is the alphabet in reverse. After V comes U.
Answer: The future. The future always lies ahead of us, but it remains invisible.
Answer: A cloud. Clouds fly, cry (rain) and follow us across the sky.
Answer: A piano. A piano is covered in keys — the musical kind.
Answer: 5 minutes. Each machine takes 5 minutes per item. With 100 machines working in parallel, it still takes 5 minutes to produce 100 items.
Answer: 12. Every month has at least 28 days! February is simply the only one that has no more than 28 (or 29 in leap years).
Answer: 96. The number is a pair of digits: the first is the alphabet position of the word's first letter, the second is the number of letters in the word. For Italie, I is the 9th letter and the word has 6 letters, giving 96.
Answer: 10. To move from one number to the next: +2, then +3, then +2, then +3, and so on.
Answer: 22 times. The hands meet roughly every 65 minutes, i.e. 11 times per 12-hour cycle (not 12, since the 11 o'clock overlap only happens at noon). Over 24 hours: 22 times.
Answer: Yes. Just check both cases. If Paul is married, he is looking at Claire (unmarried): yes. If he is not, then Sophie (married) is looking at him: yes again. The answer is yes in every case.
Answer: Light the first at both ends and the second at one end, then light the second's other end when the first has burned out. The first fuse, burning from both ends, is consumed in 30 minutes. At that moment the second has been burning for 30 minutes, leaving 30 minutes of material. Lighting its second end makes it burn twice as fast: 15 minutes. Total: 30 + 15 = 45 minutes.
Answer: 60 minutes. The first is taken immediately, the second after 30 minutes and the third after 60. Three doses create only two intervals.
Answer: Turn on the first for a few minutes, turn it off, turn on the second, then enter. Lit means the second switch; off but warm means the first; off and cold means the third. Heat provides a second piece of information.
Answer: 4 girls and 3 boys. Each girl has 3 sisters and 3 brothers; each boy has 4 sisters and 2 brothers. Both conditions are satisfied.
Answer: 24. There are 4 choices for the first digit, then 3, then 2: 4 × 3 × 2 = 24. A code may begin with zero.
Answer: A is a knave and B a knight. A cannot be a knight because the statement would call A a knave. So A lies; since “both are knaves” is false, B must be a knight.
93 more questions are waiting for you in the quiz!