Halfway Between 21 and 521

When you ask "What number is halfway between 21 and 521?" 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=521.

Halfway Between Line

To find the number halfway between 21 and 521, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 521 into our formula, we get:

(21 + 521)/2 = 271

Thus, the number halfway between 21 and 521 is 271.

To check that our answer is correct, we subtract 21 from 271 and subtract 271 from 521 and compare the two numbers:

271 - 21 = 250
521 - 271 = 250

As you can see, the halfway number is 250 higher than 21 and 250 lower than 521. Therefore, our halfway between answer of 271 above is correct.

Halfway Between
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Halfway Between 21 and 522
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