Halfway Between 21 and 401

When you ask "What number is halfway between 21 and 401?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=401.

Halfway Between Line

To find the number halfway between 21 and 401, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 401 into our formula, we get:

(21 + 401)/2 = 211

Thus, the number halfway between 21 and 401 is 211.

To check that our answer is correct, we subtract 21 from 211 and subtract 211 from 401 and compare the two numbers:

211 - 21 = 190
401 - 211 = 190

As you can see, the halfway number is 190 higher than 21 and 190 lower than 401. Therefore, our halfway between answer of 211 above is correct.

Halfway Between
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Halfway Between 21 and 402
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