What two numbers add up to 3950?

There are infinite combinations of two numbers that add up to 3950. Here are some examples using negative numbers:

-1 + 3951 = 3950
-2 + 3952 = 3950
-3 + 3953 = 3950
...

Here are some examples using two fractions that will add up to 3950:

3950/2 + 3950/2 = 3950
7900/3 + 3950/3 = 3950
11850/4 + 3950/4 = 3950
...

And here are some examples using two decimal numbers that will add up to 3950:

1.25 + 3948.75 = 3950
2.50 + 3947.5 = 3950
3.75 + 3946.25 = 3950
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3950?", 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 3950. (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 3950?" has 1975 answers:

1 + 3949 = 3950
2 + 3948 = 3950
3 + 3947 = 3950
.
.
1973 + 1977 = 3950
1974 + 1976 = 3950
1975 + 1975 = 3950

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 3950 by 2 and then rounded down to the nearest whole number if necessary.

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