Show puzzle solution Four airplanes will do the trick. One solution: Planes 1, 2, 3 and 4 take off together. After going one sixth of the distance around Earth, planes 1 and 4 transfer half their ...

A 'simple' math sequence has left the internet puzzled, proving that it may be far more complex than it appears at first ...

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But add a touch of maths to the mix, and the challenge becomes even more irresistible. (Also read: This mind-bending maths ...

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Finish the pyramind where each number is the sum to the two below it.