Linda is the CEO of a big company. One day she walked out of her modestly sized boardroom and said to her secretary, ‘Here is a report about the company accounts for last year. I would like you to make a copy of this report for all of the board members, plus one copy for me and one copy for my mother’. Linda’s secretary, John, jumped up and ran to the photocopier. He returned exactly 11 minutes later, after photocopying 169 sheets of paper. How many board members are there?
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.
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for theKindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.