Halfway Between 13 and 21

When you ask "What number is halfway between 13 and 21?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=13 and Y=21.

Halfway Between Line

To find the number halfway between 13 and 21, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 13 and 21 into our formula, we get:

(13 + 21)/2 = 17

Thus, the number halfway between 13 and 21 is 17.

To check that our answer is correct, we subtract 13 from 17 and subtract 17 from 21 and compare the two numbers:

17 - 13 = 4
21 - 17 = 4

As you can see, the halfway number is 4 higher than 13 and 4 lower than 21. Therefore, our halfway between answer of 17 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 13 and 22
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