streak
Printable Brain Teasers
Print these brain teasers for team building, classroom warmups, or travel. Each one has space for working through the problem on paper.
Tip: choose "Save as PDF" in your print dialog.
Brain Teaser - Easy
If you multiply half a dozen by a dozen, what do you get?
Brain Teaser - Medium
If 5 workers can dig 5 holes in 5 hours, how many hours does it take 100 workers to dig 100 holes?
Brain Teaser - Hard
A barrel holds 10 liters of pure wine. You remove 1 liter and replace it with water. You repeat this two more times (3 total). How many liters of wine remain?
Brain Teaser - Expert
Two trains are 100 miles apart, heading toward each other at 20 mph each. A fly starts on one train, flies to the other at 30 mph, then bounces back and forth until the trains collide. How far does the fly travel in total?
Brain Teaser - Einstein
An island gets exactly 100 visitors every day. Each visitor stays for exactly one full day, then leaves. After the island has been open for a year, how many visitors are on the island on any given day?