Halfway Between 15 and 321

When you ask "What number is halfway between 15 and 321?" 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=321.

Halfway Between Line

To find the number halfway between 15 and 321, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 321 into our formula, we get:

(15 + 321)/2 = 168

Thus, the number halfway between 15 and 321 is 168.

To check that our answer is correct, we subtract 15 from 168 and subtract 168 from 321 and compare the two numbers:

168 - 15 = 153
321 - 168 = 153

As you can see, the halfway number is 153 higher than 15 and 153 lower than 321. Therefore, our halfway between answer of 168 above is correct.

Halfway Between
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Halfway Between 15 and 322
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