
When you ask "What number is halfway between 25 and 189?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=189.

To find the number halfway between 25 and 189, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 189 into our formula, we get:
(25 + 189)/2 = 107
Thus, the number halfway between 25 and 189 is 107.
To check that our answer is correct, we subtract 25 from 107 and subtract 107 from 189 and compare the two numbers:
107 - 25 = 82
189 - 107 = 82
As you can see, the halfway number is 82 higher than 25 and 82 lower than 189. Therefore, our halfway between answer of 107 above is correct.
Halfway Between
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Halfway Between 25 and 190
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