Halfway Between 15 and 504

When you ask "What number is halfway between 15 and 504?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=504.

Halfway Between Line

To find the number halfway between 15 and 504, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 504 into our formula, we get:

(15 + 504)/2 = 259.5

Thus, the number halfway between 15 and 504 is 259.5.

To check that our answer is correct, we subtract 15 from 259.5 and subtract 259.5 from 504 and compare the two numbers:

259.5 - 15 = 244.5
504 - 259.5 = 244.5

As you can see, the halfway number is 244.5 higher than 15 and 244.5 lower than 504. Therefore, our halfway between answer of 259.5 above is correct.

Halfway Between
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Halfway Between 15 and 505
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