What two numbers add up to 3985?

There are infinite combinations of two numbers that add up to 3985. Here are some examples using negative numbers:

-1 + 3986 = 3985
-2 + 3987 = 3985
-3 + 3988 = 3985
...

Here are some examples using two fractions that will add up to 3985:

3985/2 + 3985/2 = 3985
7970/3 + 3985/3 = 3985
11955/4 + 3985/4 = 3985
...

And here are some examples using two decimal numbers that will add up to 3985:

1.25 + 3983.75 = 3985
2.50 + 3982.5 = 3985
3.75 + 3981.25 = 3985
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3985?", 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 3985. (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 3985?" has 1992 answers:

1 + 3984 = 3985
2 + 3983 = 3985
3 + 3982 = 3985
.
.
1990 + 1995 = 3985
1991 + 1994 = 3985
1992 + 1993 = 3985

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 3985 by 2 and then rounded down to the nearest whole number if necessary.

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