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Logical Deduction

Logical Deduction

Conditional statements, syllogisms, ordering and rule-based puzzles. A practice set for fun — not an official or clinical IQ test.

12 questions12 minMediumKnowledge

What's inside this quiz

12 questions in the IQ & Logic category, about 12 min. Here are the questions you'll answer — correct answers and explanations appear as you play.

See the questions
  1. All cats are mammals. Tom is a cat. What must be true?
  2. Anna is taller than Ben, and Ben is taller than Carl. Who is the shortest?
  3. If it rains, the pavement gets wet. The pavement is completely dry. What follows?
  4. The café is closed every Monday. Today the café is open. What must be true?
  5. The meeting is after Tuesday and before Friday, but not on Wednesday. Which day is it?
  6. A code turns a word into its first letter followed by its number of letters: “cat” becomes C3. What does “house” become?
  7. Some artists are musicians. All musicians can read music. What must be true?
  8. No reptile has fur. Some pets have fur. What must be true?
  9. Four runners finish a race. Lea finishes ahead of Max. Max finishes ahead of Noor. Omar finishes between Lea and Max. Who finishes third?
  10. “If a shape is a square, it has four sides.” A shape has four sides. What can you conclude?
  11. Three boxes are labelled “Apples”, “Oranges” and “Mixed”, and every label is wrong. You take one fruit from the box labelled “Mixed” and it is an apple. What is in the box labelled “Oranges”?
  12. One guard always tells the truth and the other always lies, but you do not know which is which. You ask guard A: “Would guard B say the left door is safe?” A answers “Yes.” Which door is safe?

Instructions

Suggested time: 12 minutes. 12 questions, from easy to hard. Use only the information given and pick the conclusion that must be true. An explanation appears after every answer. This is a non-standardized practice set for entertainment and training; it does not measure or produce an IQ score.

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