Halfway Between 15 and 421

When you ask "What number is halfway between 15 and 421?" 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=421.

Halfway Between Line

To find the number halfway between 15 and 421, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 421 into our formula, we get:

(15 + 421)/2 = 218

Thus, the number halfway between 15 and 421 is 218.

To check that our answer is correct, we subtract 15 from 218 and subtract 218 from 421 and compare the two numbers:

218 - 15 = 203
421 - 218 = 203

As you can see, the halfway number is 203 higher than 15 and 203 lower than 421. Therefore, our halfway between answer of 218 above is correct.

Halfway Between
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Halfway Between 15 and 422
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