Difficult Brain Teasers

These brain teasers are rated our most difficult and challenging. Can you solve them?

Total matches: 13
Title  Detail  Rating  
How would you weigh an aeroplane... more>>>4 shiney stars
23 PrisonersA warden meets with the 23 prisoners when they arrive at the prison. He tells them: You may meet together today and plan... more>>>3.5 shiney stars
Apples and OrangesThere are 3 wooden crates. One labeled "Apples." One labeled " Oranges." One labeled "Apples & Oranges." They are all labeled... more>>>4 shiney stars
Total matches: 13