What two numbers add up to 9918?

There are infinite combinations of two numbers that add up to 9918. Here are some examples using negative numbers:

-1 + 9919 = 9918
-2 + 9920 = 9918
-3 + 9921 = 9918
...

Here are some examples using two fractions that will add up to 9918:

9918/2 + 9918/2 = 9918
19836/3 + 9918/3 = 9918
29754/4 + 9918/4 = 9918
...

And here are some examples using two decimal numbers that will add up to 9918:

1.25 + 9916.75 = 9918
2.50 + 9915.5 = 9918
3.75 + 9914.25 = 9918
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 9918?", 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 9918. (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 9918?" has 4959 answers:

1 + 9917 = 9918
2 + 9916 = 9918
3 + 9915 = 9918
.
.
4957 + 4961 = 9918
4958 + 4960 = 9918
4959 + 4959 = 9918

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 9918 by 2 and then rounded down to the nearest whole number if necessary.

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