Question 1197897
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An even number is anything that is a multiple of 2.


More formally, it's a number of the form 2k where k is an integer.
set of integers = {..., -3, -2, -1, 0, 1, 2, 3, ...}
i.e. set of positive and negative whole numbers, with 0 thrown in as well.


If k = 5 for instance, then 2k = 2*5 = 10 which is even.
Or if k = 27, then 2k = 2*27 = 54 which is also even.


We can show that 0 is even since,
2k = 0
k = 0/2
k = 0
So 2k = 2*0 = 0 is an even number.


Further Reading
<a href = "https://mathworld.wolfram.com/EvenNumber.html">https://mathworld.wolfram.com/EvenNumber.html</a>
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