Halfway Between 15 and 511

When you ask "What number is halfway between 15 and 511?" 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=511.

Halfway Between Line

To find the number halfway between 15 and 511, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 511 into our formula, we get:

(15 + 511)/2 = 263

Thus, the number halfway between 15 and 511 is 263.

To check that our answer is correct, we subtract 15 from 263 and subtract 263 from 511 and compare the two numbers:

263 - 15 = 248
511 - 263 = 248

As you can see, the halfway number is 248 higher than 15 and 248 lower than 511. Therefore, our halfway between answer of 263 above is correct.

Halfway Between
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Halfway Between 15 and 512
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