Any combination of them.
Is this suppose to be a joke? You can take away the "S" from seven, now it is even. IN math you would minus 1 or subtract 1 to make it an even number. even numbers are 2,4,6,8,10,12,14,16... . Double it.
Zero is an even number, but to say even numbers start with zero does not take into account even negative numbers. Zero is an even number on an infinite list of even numbers that has no beginning and no end.
The result of subtracting a negative number minus a negative number can be positive, or negative, depending on which of the numbers is larger. It can even be zero.
You can simply take the lowest even numbers and subtract it i.e. 4-2=2
Sort the numbers, and pick the number in the middle. In this case, since you have an even number of numbers, take the average of the two numbers in the middle.
The answer is seven because if you take away the letter 's' it then becomes the word 'even'.
Seven!
take away the s
Put the numbers in size order. The range is the biggest number minus/take away the smallest number. 123456789, in this case it is 8. GET IT?
Move to the left. For example: when you start with 10 and take away 4, you start at 10 on the number line and move four numbers to the left to reach 6 as your answer.
This will happen if you have an even number of numbers. In this case you take the average of the two central numbers.
Eleven ... ELEVEN - EL = EVEN