What two numbers add up to 9830?

There are infinite combinations of two numbers that add up to 9830. Here are some examples using negative numbers:

-1 + 9831 = 9830
-2 + 9832 = 9830
-3 + 9833 = 9830
...

Here are some examples using two fractions that will add up to 9830:

9830/2 + 9830/2 = 9830
19660/3 + 9830/3 = 9830
29490/4 + 9830/4 = 9830
...

And here are some examples using two decimal numbers that will add up to 9830:

1.25 + 9828.75 = 9830
2.50 + 9827.5 = 9830
3.75 + 9826.25 = 9830
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 9830?", 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 9830. (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 9830?" has 4915 answers:

1 + 9829 = 9830
2 + 9828 = 9830
3 + 9827 = 9830
.
.
4913 + 4917 = 9830
4914 + 4916 = 9830
4915 + 4915 = 9830

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 9830 by 2 and then rounded down to the nearest whole number if necessary.

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