What two numbers add up to 3901?

There are infinite combinations of two numbers that add up to 3901. Here are some examples using negative numbers:

-1 + 3902 = 3901
-2 + 3903 = 3901
-3 + 3904 = 3901
...

Here are some examples using two fractions that will add up to 3901:

3901/2 + 3901/2 = 3901
7802/3 + 3901/3 = 3901
11703/4 + 3901/4 = 3901
...

And here are some examples using two decimal numbers that will add up to 3901:

1.25 + 3899.75 = 3901
2.50 + 3898.5 = 3901
3.75 + 3897.25 = 3901
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3901?", 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 3901. (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 3901?" has 1950 answers:

1 + 3900 = 3901
2 + 3899 = 3901
3 + 3898 = 3901
.
.
1948 + 1953 = 3901
1949 + 1952 = 3901
1950 + 1951 = 3901

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 3901 by 2 and then rounded down to the nearest whole number if necessary.

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