It is not possible to add up an even and uneven number to attain ten, or any other even number.
Consider the following a proof:
a is a even number
b is a uneven number, this means that (b-1) is a even number.
a+b = a + (b-1) + 1
2 even numbers added up always result in an even number. And each time, 1 gets added to that sum, netting a uneven number.
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