Halfway Between 13 and 686

When you ask "What number is halfway between 13 and 686?" 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=686.

Halfway Between Line

To find the number halfway between 13 and 686, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 13 and 686 into our formula, we get:

(13 + 686)/2 = 349.5

Thus, the number halfway between 13 and 686 is 349.5.

To check that our answer is correct, we subtract 13 from 349.5 and subtract 349.5 from 686 and compare the two numbers:

349.5 - 13 = 336.5
686 - 349.5 = 336.5

As you can see, the halfway number is 336.5 higher than 13 and 336.5 lower than 686. Therefore, our halfway between answer of 349.5 above is correct.

Halfway Between
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Halfway Between 13 and 687
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