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Earn +20 ptsQ: Is 0 a number or a placeholder?
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Is 0 a real number?
NO, negative numbers are though. 0 is more like a placeholder. It's not a actual number. It CAN be a digit, though! Love, :D
What is the most used number in math?
Possibly 0; as 0 is imperative as a placeholder for all numbers. However, it is extremely difficult to predict what number is the "most used" in (generalised?) "math".
Does a variable serve as a placeholder for a number?
yes
Why do you call the number 0 a zero?
Zero is a placeholder. The Ancient Chinese used it, the ancient Egyptians used it, ancient India and the Arabs used it. The word came into English from Italian zero.
Is x a prime number?
x is a placeholder for a number. Depending what number you decide that x should be, it will be a prime number, or it won't.
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