What two numbers add up to 4086?

There are infinite combinations of two numbers that add up to 4086. Here are some examples using negative numbers:

-1 + 4087 = 4086
-2 + 4088 = 4086
-3 + 4089 = 4086
...

Here are some examples using two fractions that will add up to 4086:

4086/2 + 4086/2 = 4086
8172/3 + 4086/3 = 4086
12258/4 + 4086/4 = 4086
...

And here are some examples using two decimal numbers that will add up to 4086:

1.25 + 4084.75 = 4086
2.50 + 4083.5 = 4086
3.75 + 4082.25 = 4086
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 4086?", 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 4086. (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 4086?" has 2043 answers:

1 + 4085 = 4086
2 + 4084 = 4086
3 + 4083 = 4086
.
.
2041 + 2045 = 4086
2042 + 2044 = 4086
2043 + 2043 = 4086

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 4086 by 2 and then rounded down to the nearest whole number if necessary.

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