When you ask "What number is halfway between 21 and 163?" 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=163.
To find the number halfway between 21 and 163, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 163 into our formula, we get:
(21 + 163)/2 = 92
Thus, the number halfway between 21 and 163 is 92.
To check that our answer is correct, we subtract 21 from 92 and subtract 92 from 163 and compare the two numbers:
92 - 21 = 71
163 - 92 = 71
As you can see, the halfway number is 71 higher than 21 and 71 lower than 163. Therefore, our halfway between answer of 92 above is correct.
Halfway Between
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Halfway Between 21 and 164
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