3 - Wikipedia 3 (three) is a number, numeral and digit It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number
3 (number) - New World Encyclopedia Three is the first odd prime number, and the second smallest prime It is both the first Fermat prime (2 2º + 1) and the first Mersenne prime (2² - 1), as well as the first lucky prime
Math Calculator Math Calculator from Mathway will evaluate various math problems from basic arithmetic to advanced trigonometric expressions
3 -- from Wolfram MathWorld 3 is the only integer which is the sum of the preceding positive integers (1+2=3) and the only number which is the sum of the factorials of the preceding positive integers (1!+2!=3)
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The number three - Britannica The number 3 is a very mystical and spiritual number featured in many folktales (three wishes, three guesses, three little pigs, three bears, three billy goats gruff)
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