What two numbers add up to 8518?

There are infinite combinations of two numbers that add up to 8518. Here are some examples using negative numbers:

-1 + 8519 = 8518
-2 + 8520 = 8518
-3 + 8521 = 8518
...

Here are some examples using two fractions that will add up to 8518:

8518/2 + 8518/2 = 8518
17036/3 + 8518/3 = 8518
25554/4 + 8518/4 = 8518
...

And here are some examples using two decimal numbers that will add up to 8518:

1.25 + 8516.75 = 8518
2.50 + 8515.5 = 8518
3.75 + 8514.25 = 8518
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 8518?", it may be more interesting to set some criteria to limit the result. We will set the follow criteria:

1) Only positive whole numbers can add up to 8518. (0 is not a positive or negative number and should not be included.)

2) Since a+b=29 is the same as b+a=29, we should only list it once.

Now, the answer to "What two numbers add up to 8518?" has 4259 answers:

1 + 8517 = 8518
2 + 8516 = 8518
3 + 8515 = 8518
.
.
4257 + 4261 = 8518
4258 + 4260 = 8518
4259 + 4259 = 8518

We have truncated the list above due to space, but you may be interested to know that we calculated the number of answers by dividing 8518 by 2 and then rounded down to the nearest whole number if necessary.

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