What two numbers add up to 1233?

There are infinite combinations of two numbers that add up to 1233. Here are some examples using negative numbers:

-1 + 1234 = 1233
-2 + 1235 = 1233
-3 + 1236 = 1233
...

Here are some examples using two fractions that will add up to 1233:

1233/2 + 1233/2 = 1233
2466/3 + 1233/3 = 1233
3699/4 + 1233/4 = 1233
...

And here are some examples using two decimal numbers that will add up to 1233:

1.25 + 1231.75 = 1233
2.50 + 1230.5 = 1233
3.75 + 1229.25 = 1233
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 1233?", 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 1233. (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 1233?" has 616 answers:

1 + 1232 = 1233
2 + 1231 = 1233
3 + 1230 = 1233
.
.
614 + 619 = 1233
615 + 618 = 1233
616 + 617 = 1233

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 1233 by 2 and then rounded down to the nearest whole number if necessary.

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