When you ask "What number is halfway between 15 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=15 and Y=163.
To find the number halfway between 15 and 163, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 163 into our formula, we get:
(15 + 163)/2 = 89
Thus, the number halfway between 15 and 163 is 89.
To check that our answer is correct, we subtract 15 from 89 and subtract 89 from 163 and compare the two numbers:
89 - 15 = 74
163 - 89 = 74
As you can see, the halfway number is 74 higher than 15 and 74 lower than 163. Therefore, our halfway between answer of 89 above is correct.
Halfway Between
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Halfway Between 15 and 164
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