On Saturday I am interviewing the immensely talented Derren Brown as part of the Edinburgh International Science Festival. The event sold out very quickly and I am looking forward to it. If you were lucky enough to get a ticket please note that there has been a venue change, and that the event will now take place in the Church Hill Theatre.
So, to the puzzle…..
Imagine that you are standing on the banks of a straight river. Across from you is a sign on the opposite bank. To your right is a tree. You have nothing to measure with and cannot cross the river. How can you figure out roughly how far you are from the sign?
As ever, please do NOT post your answers, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.
Oh, and feel free to post any questions that you would like me to ask Derren.