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Number Puzzles

Part of Math Riddles collection

Explore 655+ unique, interactive number puzzles puzzles.

Fun counting games, prime number riddles, and secret code math challenges.

Interactive Riddle Challenge

Showing Number Puzzles riddles

The Meeting That Could Be Email

I waste 30 minutes of everyone's time, I could be summarized in 3 sentences,...

1,781 solved Number Puzzles

The Numbered Houses

A detective is told the suspect lives at an even-numbered house between 10 and...

15,023 solved Biology Riddles

Person A knows the sum of two numbers (2-99). Person B knows their product....

6,798 solved Logic

The Ship of Memory

If you could upload your entire consciousness into a computer and then your body...

7,982 solved Mind Bending Riddles

The Apple Division

How do you divide 5 apples among 6 people?

20,827 solved Lateral Thinking Riddles

The Night Light Bug

I glow in the dark on summer nights. Children catch me in jars. What...

6,338 solved Insect Riddles

The Cicada Cycle

I live underground for 13 or 17 years, then emerge all at once in...

19,076 solved Insect Riddles

The Cricket Thermometer

If you count the number of my chirps in 14 seconds and add 40,...

9,734 solved Insect Riddles

The Tennis Ball Count

How many tennis balls can fit in this room?

24,096 solved Interview Riddles

The 25 Horses Problem

You have 25 horses and a 5-lane track. No stopwatch. What is the minimum...

11,089 solved Farm Animal Riddles

The Pirate Division

5 perfectly logical pirates divide 100 gold coins. The most senior proposes; majority vote...

12,287 solved Interview Riddles

The Coin Probability

You flip a coin until you get heads. What is the expected number of...

16,301 solved Interview Riddles

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