What two numbers add up to 7787?

There are infinite combinations of two numbers that add up to 7787. Here are some examples using negative numbers:

-1 + 7788 = 7787
-2 + 7789 = 7787
-3 + 7790 = 7787
...

Here are some examples using two fractions that will add up to 7787:

7787/2 + 7787/2 = 7787
15574/3 + 7787/3 = 7787
23361/4 + 7787/4 = 7787
...

And here are some examples using two decimal numbers that will add up to 7787:

1.25 + 7785.75 = 7787
2.50 + 7784.5 = 7787
3.75 + 7783.25 = 7787
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 7787?", 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 7787. (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 7787?" has 3893 answers:

1 + 7786 = 7787
2 + 7785 = 7787
3 + 7784 = 7787
.
.
3891 + 3896 = 7787
3892 + 3895 = 7787
3893 + 3894 = 7787

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 7787 by 2 and then rounded down to the nearest whole number if necessary.

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