Halfway Between 21 and 310

When you ask "What number is halfway between 21 and 310?" 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=310.

Halfway Between Line

To find the number halfway between 21 and 310, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 310 into our formula, we get:

(21 + 310)/2 = 165.5

Thus, the number halfway between 21 and 310 is 165.5.

To check that our answer is correct, we subtract 21 from 165.5 and subtract 165.5 from 310 and compare the two numbers:

165.5 - 21 = 144.5
310 - 165.5 = 144.5

As you can see, the halfway number is 144.5 higher than 21 and 144.5 lower than 310. Therefore, our halfway between answer of 165.5 above is correct.

Halfway Between
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Halfway Between 21 and 311
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