What two numbers add up to 1681?

There are infinite combinations of two numbers that add up to 1681. Here are some examples using negative numbers:

-1 + 1682 = 1681
-2 + 1683 = 1681
-3 + 1684 = 1681
...

Here are some examples using two fractions that will add up to 1681:

1681/2 + 1681/2 = 1681
3362/3 + 1681/3 = 1681
5043/4 + 1681/4 = 1681
...

And here are some examples using two decimal numbers that will add up to 1681:

1.25 + 1679.75 = 1681
2.50 + 1678.5 = 1681
3.75 + 1677.25 = 1681
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 1681?", 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 1681. (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 1681?" has 840 answers:

1 + 1680 = 1681
2 + 1679 = 1681
3 + 1678 = 1681
.
.
838 + 843 = 1681
839 + 842 = 1681
840 + 841 = 1681

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 1681 by 2 and then rounded down to the nearest whole number if necessary.

Numbers That Add Up To Calculator
Submit another "What two numbers add up to x?" problem here.

What two numbers add up to 1682?
Here is the next problem on our list that we answered and explained in a similar fashion.