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Complete a series of mathematical puzzles before the countdown clock reaches zero! Reach the target number by adding, subtracting, multiplying and dividing the smaller numbers together before the time runs out. The more targets you reach, the more time you gain.This addictive numbers game, with multiple speed and difficulty levels, will test your mental arithmetic skills to the limit.If this sounds too frenetic you can now also practise at your leisure with mini games on your Apple Watch.