24 o'clock game

24 o'clock game 24 Point Calculator - 24 Point Game Please enter four integers: Find an answer! Find five answers! Find ten answers! Find all the answers!

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Is 1 a prime number

Is 1 a prime number Is 1 a prime number? Definition of prime number: A divisor has only 1 and its own number. Under this definition, it is not explicitly stated that 1 is not equal to itself, that is,

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