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It's supposed to be a simple maths puzzle - but it's left many scratching their heads. Physical fitness and mental health are two sides of the same coin. To keep your brain in tip-top condition, it's ...

Think you have sharp reasoning skills? Solve this math puzzle quickly and discover if you can spot the hidden pattern.

In 1974, a geneticist named Marsha Jean Falco devised an ingenious research tool to help determine whether epilepsy in dogs was an inherited trait. She drew a series of symbols on index cards, where ...