We have given you a few of these river crossing puzzles, and here is another tricky one.
Two boys want to cross a river and there is one boat available. The boat will carry only one boy at a time and it is the only way to cross the river. Both boys can operate the boat.
The boat cannot cross the river by itself, and there are no ropes or any other tricks to move the boat without being in it.
How do both boys cross the river in the boat?
As usual you can post the answers as a comment on this website, reply to the post on Facebook, or retweet or reply on Twitter @quizmastershop.
Answer at 9.00 on Monday