What two numbers add up to 6990?

There are infinite combinations of two numbers that add up to 6990. Here are some examples using negative numbers:

-1 + 6991 = 6990
-2 + 6992 = 6990
-3 + 6993 = 6990
...

Here are some examples using two fractions that will add up to 6990:

6990/2 + 6990/2 = 6990
13980/3 + 6990/3 = 6990
20970/4 + 6990/4 = 6990
...

And here are some examples using two decimal numbers that will add up to 6990:

1.25 + 6988.75 = 6990
2.50 + 6987.5 = 6990
3.75 + 6986.25 = 6990
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 6990?", 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 6990. (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 6990?" has 3495 answers:

1 + 6989 = 6990
2 + 6988 = 6990
3 + 6987 = 6990
.
.
3493 + 3497 = 6990
3494 + 3496 = 6990
3495 + 3495 = 6990

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 6990 by 2 and then rounded down to the nearest whole number if necessary.

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