What two numbers add up to 3992?

There are infinite combinations of two numbers that add up to 3992. Here are some examples using negative numbers:

-1 + 3993 = 3992
-2 + 3994 = 3992
-3 + 3995 = 3992
...

Here are some examples using two fractions that will add up to 3992:

3992/2 + 3992/2 = 3992
7984/3 + 3992/3 = 3992
11976/4 + 3992/4 = 3992
...

And here are some examples using two decimal numbers that will add up to 3992:

1.25 + 3990.75 = 3992
2.50 + 3989.5 = 3992
3.75 + 3988.25 = 3992
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3992?", 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 3992. (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 3992?" has 1996 answers:

1 + 3991 = 3992
2 + 3990 = 3992
3 + 3989 = 3992
.
.
1994 + 1998 = 3992
1995 + 1997 = 3992
1996 + 1996 = 3992

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 3992 by 2 and then rounded down to the nearest whole number if necessary.

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