It is 0 because it is between two odd numbers which are -1 and +1
Yes, because if it is an even number it at least has 2, itself and 1
0 is even, but not positive.
The number 1.
The least multiple of any positive number is the number itself.
The square of every positive or negative even whole number is a positive even whole number. The square of every positive or negative odd whole number is a positive odd whole number. There are an infinite number of each kind.
12.
The LCM of two and any other positive even number is the other positive even number.
Positive 1
It is 1.
Any even number has at least one even factor.
Yes, the number zero. If you want to exclude zero too, there is no least positive number.
Positive