Halfway Between 13 and 665

When you ask "What number is halfway between 13 and 665?" 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=665.

Halfway Between Line

To find the number halfway between 13 and 665, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 13 and 665 into our formula, we get:

(13 + 665)/2 = 339

Thus, the number halfway between 13 and 665 is 339.

To check that our answer is correct, we subtract 13 from 339 and subtract 339 from 665 and compare the two numbers:

339 - 13 = 326
665 - 339 = 326

As you can see, the halfway number is 326 higher than 13 and 326 lower than 665. Therefore, our halfway between answer of 339 above is correct.

Halfway Between
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Halfway Between 13 and 666
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