Halfway Between 15 and 515

When you ask "What number is halfway between 15 and 515?" 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=515.

Halfway Between Line

To find the number halfway between 15 and 515, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 515 into our formula, we get:

(15 + 515)/2 = 265

Thus, the number halfway between 15 and 515 is 265.

To check that our answer is correct, we subtract 15 from 265 and subtract 265 from 515 and compare the two numbers:

265 - 15 = 250
515 - 265 = 250

As you can see, the halfway number is 250 higher than 15 and 250 lower than 515. Therefore, our halfway between answer of 265 above is correct.

Halfway Between
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Halfway Between 15 and 516
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