What two numbers add up to 620?

There are infinite combinations of two numbers that add up to 620. Here are some examples using negative numbers:

-1 + 621 = 620
-2 + 622 = 620
-3 + 623 = 620
...

Here are some examples using two fractions that will add up to 620:

620/2 + 620/2 = 620
1240/3 + 620/3 = 620
1860/4 + 620/4 = 620
...

And here are some examples using two decimal numbers that will add up to 620:

1.25 + 618.75 = 620
2.50 + 617.5 = 620
3.75 + 616.25 = 620
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 620?", 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 620. (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 620?" has 310 answers:

1 + 619 = 620
2 + 618 = 620
3 + 617 = 620
.
.
308 + 312 = 620
309 + 311 = 620
310 + 310 = 620

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 620 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 621?
Here is the next problem on our list that we answered and explained in a similar fashion.