What two numbers add up to 3956?

There are infinite combinations of two numbers that add up to 3956. Here are some examples using negative numbers:

-1 + 3957 = 3956
-2 + 3958 = 3956
-3 + 3959 = 3956
...

Here are some examples using two fractions that will add up to 3956:

3956/2 + 3956/2 = 3956
7912/3 + 3956/3 = 3956
11868/4 + 3956/4 = 3956
...

And here are some examples using two decimal numbers that will add up to 3956:

1.25 + 3954.75 = 3956
2.50 + 3953.5 = 3956
3.75 + 3952.25 = 3956
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 3956?", 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 3956. (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 3956?" has 1978 answers:

1 + 3955 = 3956
2 + 3954 = 3956
3 + 3953 = 3956
.
.
1976 + 1980 = 3956
1977 + 1979 = 3956
1978 + 1978 = 3956

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 3956 by 2 and then rounded down to the nearest whole number if necessary.

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