Logic riddles and brain teasers quiz

All 10 questions and answers

Want to check an answer or run the quiz out loud? Every question is here, with the answer hidden until you open it.

1. A bat and ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much is the ball?
   • 10 cents
   • 1 cent
   • 5 cents
   • 15 cents
   Show answer

   5 cents. Ball $0.05 + bat $1.05 = $1.10.

2. A farmer has 17 sheep. All but 9 run away. How many are left?
   • 9
   • 17
   • 0
   • 8
   Show answer

   9. 'All but 9' means 9 stay.

3. In a race, you overtake the person in second place. What place are you now?
   • Last
   • First
   • Second
   • Third
   Show answer

   Second. You took their place, not first place.

4. How many months have 28 days?
   • 2
   • 1
   • All 12
   • 6
   Show answer

   All 12. Every month has at least 28 days.

5. 5 machines take 5 minutes to make 5 widgets. How long do 100 machines take to make 100 widgets?
   • 1 minute
   • 100 minutes
   • 20 minutes
   • 5 minutes
   Show answer

   5 minutes. Each machine makes one widget in 5 minutes.

6. A patch of lily pads doubles in size every day and covers the lake in 48 days. On what day was it half covered?
   • Day 47
   • Day 46
   • Day 12
   • Day 24
   Show answer

   Day 47. It doubles from half to full on the last day.

7. What comes next: 2, 4, 8, 16, …?
   • 20
   • 18
   • 32
   • 24
   Show answer

   32. Each number doubles.

8. What gets wetter the more it dries?
   • Soap
   • A sponge
   • A towel
   • Rain
   Show answer

   A towel. It dries you and gets wet itself.

9. Mary's father has five daughters: Nana, Nene, Nini and Nono. What is the fifth daughter's name?
   • Mary
   • Nina
   • Nunu
   • Nyla
   Show answer

   Mary. Mary is the fifth daughter.

10. What has keys but can't open locks?
    • A car
    • A door
    • A map
    • A piano
    Show answer

    A piano. Piano keys play notes.