What two numbers add up to 7931?

There are infinite combinations of two numbers that add up to 7931. Here are some examples using negative numbers:

-1 + 7932 = 7931
-2 + 7933 = 7931
-3 + 7934 = 7931
...

Here are some examples using two fractions that will add up to 7931:

7931/2 + 7931/2 = 7931
15862/3 + 7931/3 = 7931
23793/4 + 7931/4 = 7931
...

And here are some examples using two decimal numbers that will add up to 7931:

1.25 + 7929.75 = 7931
2.50 + 7928.5 = 7931
3.75 + 7927.25 = 7931
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 7931?", 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 7931. (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 7931?" has 3965 answers:

1 + 7930 = 7931
2 + 7929 = 7931
3 + 7928 = 7931
.
.
3963 + 3968 = 7931
3964 + 3967 = 7931
3965 + 3966 = 7931

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 7931 by 2 and then rounded down to the nearest whole number if necessary.

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