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All numbers can make a square. Every real number makes a positive real square. Every rational number makes a rational square. Every integer makes a perfect square.
yes, a fraction IS composed of numbers AND it is PART of a number, so it makes it a number.========================Yes, consider 1/2, this is a fraction (a half) but it is the same as 0.5 which is a real number.
The square of a real number is always a real number.
No, they are quite real. It is just that in some situations it makes sense to use negative numbers, in others not.
It is a real number between 0.5 and 1. Whether or not it is independent makes no difference to this answer.