Halfway Between 21 and 253

When you ask "What number is halfway between 21 and 253?" 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=253.

Halfway Between Line

To find the number halfway between 21 and 253, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 253 into our formula, we get:

(21 + 253)/2 = 137

Thus, the number halfway between 21 and 253 is 137.

To check that our answer is correct, we subtract 21 from 137 and subtract 137 from 253 and compare the two numbers:

137 - 21 = 116
253 - 137 = 116

As you can see, the halfway number is 116 higher than 21 and 116 lower than 253. Therefore, our halfway between answer of 137 above is correct.

Halfway Between
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Halfway Between 21 and 254
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