While the brain isn't technically a muscle, science shows it still needs regular workouts to stay sharp. One great way to keep it active? Challenging it with riddles that push you to think ...

Here are twelve tricksy Christmas riddles with a scientific twist. Can you solve them all? When you’re ready, scroll down for the answers. (1) What an honour! You have been invited to dine with a host ...

888 + 88 + 8 + 8 + 8 = 1,000. This is the kind of math riddle you can work out with times tables, or by simple logic. First, get as close to 1,000 as you can (888). From there, it’s easy to figure out ...