Medium cases
Footprints in One Direction★★☆about 5 min
Three Switches, One Bulb★★☆about 5 min
Cutting a Gold Bar Twice★★☆about 5 min
Three Doors and a Detective★★☆about 5 min
Measuring a Building by Its Shadow★★☆about 4 min
The Round-Trip Average Speed★★☆about 5 min
Over the Weight Limit★★☆about 5 min
The Twenty-Minute Head Start★★☆about 5 min
Nine Minutes from Two Hourglasses★★☆about 6 min
Twenty-Three People★★☆about 5 min
Counting Coins by Remainders★★☆about 6 min
Three-Cent and Five-Cent Stamps★★☆about 5 min
The Gap Under the Door★★☆about 5 min
Moving the Bolt★★☆about 5 min
Poison Hidden in the Ice★★☆about 5 min
Three Cuts Through a Cake★★☆about 5 min
What Day Is the Thirteenth?★★☆about 4 min
Three Sticks, One Triangle★★☆about 4 min