Erica has two children. One of them is a boy. What is the probability of her other child also being a boy?
Over a million people have visited Professor Richard Wiseman’s blog, eager to solve the cunning conundrums and perplexing puzzles that he posts each week. PUZZLED 2 presents 101 of the most popular brainteasers from the site, along with the sneaky solutions. A heady mixture of lateral thinking problems, mathematical mysteries, logical riddles and visual oddities, this road-tested collection will appeal to those with the most curious of dispositions.
Perfect for anyone who wants to test their puzzle solving skills, give their brain a mental workout, or is in need of over 100 of the world's best conundrums.
Oh, and the answer to Erica's puzzle is not 50%!