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Há 1 dia · Four is the smallest composite number, its proper divisors being 1 and 2. [4] Four is the sum and product of two with itself: , the only non-zero number such that , which also makes four the smallest and only even squared prime number and hence the first squared prime of the form , where is a prime.
Há 1 dia · Development and production Origins Supermarine Type 224 In 1931, the Air Ministry released specification F7/30, calling for a modern fighter capable of a flying speed of 250 mph (400 km/h) to replace the Gloster Gauntlet biplane. R. J. Mitchell designed the Supermarine Type 224 to fill this role. The 224 was an open-cockpit monoplane with bulky gull wings and a large, fixed, spatted ...
