Numbers are either irrational (like the square root of 2 or pi) or rational (can be stated as a fraction using whole numbers). Irrational Numbers are never rational.
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When a rational numbers is divided by an irrational number, the answer is irrational for every non-zero rational number.
It is a rational number and also a prime number
It is a rational number.
If an irrational number is added to, (or multiplied by) a rational number, the result will always be an irrational number.
Can be irrational or rational.1 [rational] * sqrt(2) [irrational] = sqrt(2) [irrational]0 [rational] * sqrt(2) [irrational] = 0 [rational]