Halfway Between 4 and 15

When you ask "What number is halfway between 4 and 15?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=15.

Halfway Between Line

To find the number halfway between 4 and 15, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 4 and 15 into our formula, we get:

(4 + 15)/2 = 9.5

Thus, the number halfway between 4 and 15 is 9.5.

To check that our answer is correct, we subtract 4 from 9.5 and subtract 9.5 from 15 and compare the two numbers:

9.5 - 4 = 5.5
15 - 9.5 = 5.5

As you can see, the halfway number is 5.5 higher than 4 and 5.5 lower than 15. Therefore, our halfway between answer of 9.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 4 and 16
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