What two numbers add up to 3973?

There are infinite combinations of two numbers that add up to 3973. Here are some examples using negative numbers:

-1 + 3974 = 3973
-2 + 3975 = 3973
-3 + 3976 = 3973
...

Here are some examples using two fractions that will add up to 3973:

3973/2 + 3973/2 = 3973
7946/3 + 3973/3 = 3973
11919/4 + 3973/4 = 3973
...

And here are some examples using two decimal numbers that will add up to 3973:

1.25 + 3971.75 = 3973
2.50 + 3970.5 = 3973
3.75 + 3969.25 = 3973
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3973?", 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 3973. (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 3973?" has 1986 answers:

1 + 3972 = 3973
2 + 3971 = 3973
3 + 3970 = 3973
.
.
1984 + 1989 = 3973
1985 + 1988 = 3973
1986 + 1987 = 3973

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 3973 by 2 and then rounded down to the nearest whole number if necessary.

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