Even numbers are always integers, by definition.
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Two is an even integer because it is a whole number that can be divided by two and still come out with a whole number.
Yes. Any even number can be expressed as 2x (where x is an integer). (2x)2 = 4x2. We don't know exactly what x2 is, and we don't need to know, because we know that the square of any integer is also an integer, and any integer multiplied by 4 is an even number.
Yes, you can. An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2.
No. Any number that has a decimal place is not an integer. Even if the decimal place is ".0".
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