The answer is sometimes - when the multiple in question is 1.
Always even.
Sometimes 2.
Never, it will always be negative, regardless the numbers.
No, it is never even.
Sometimes
Sometimes.
always
Sometimes true.
never
Always
The answer is sometimes - when the multiple in question is 1.
Diagonals are normally equal in lengths
Sometimes.
Never.
Whole numbers can never be irrational.
They are always true - if your calculations are sound.