7 (number) - Simple English Wikipedia, the free encyclopedia
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WEBThe number seven is a natural number that comes after six and before eight. In Roman numerals, it is VII . Mathematics. In mathematics, the number seven is an odd number and a prime number . It is also a Mersenne prime . Divisibility Rule. To test if an integer is divisible by 7 or not, Take off the last digit and multiply it by 2.
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