All non-zero numbers are, in fact, signed numbers. We know that all the real numbers make up the real number line. That line is divided into the positive and the negative real numbers, and zero as the dividing point. Every number we can think of is either to the right or left of zero, making that number positive or negative, respectively. We can even assign a sign to imaginary numbers, so they, too, will have a sign associated with them.
One is a factor of all nonzero numbers.
All nonzero numbers are significant.
The product of two nonzero whole numbers will be a nonzero whole number.
All nonzero numbers are significant.
The quotient of two nonzero integers is the definition of a rational number. There are nonzero numbers other than integers (imaginary, rational non-integers) that the quotient of would not be a rational number. If the two nonzero numbers are rational themselves, then the quotient will be rational. (For example, 4 divided by 2 is 2: all of those numbers are rational).
All nonzero numbers have an infinite amount of multiples.
Three - all nonzero numbers are significant.
Three - all nonzero numbers are significant.
Two. All nonzero numbers are significant.
Three - all nonzero numbers are significant.
Four - all nonzero numbers are significant.
Two - all nonzero numbers are significant.