Indian teenager Aaryan Shulka performs calculations in his head quicker than most people can use a calculator. At a recent ...

Today's optical illusion challenge will put your observation skills to the test! Hidden among a pattern of dollars is a single number "8." Can you spot it? Try it now and see how quickly you can find ...

Mathematician Dr Tom Crawford will stand in for Rachel Riley on Channel 4’s Countdown while she takes a short break to work on another project, it has been announced. Dr Crawford is well-known for his ...