
When you ask "What number is halfway between 39 and 249?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=39 and Y=249.

To find the number halfway between 39 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 249 into our formula, we get:
(39 + 249)/2 = 144
Thus, the number halfway between 39 and 249 is 144.
To check that our answer is correct, we subtract 39 from 144 and subtract 144 from 249 and compare the two numbers:
144 - 39 = 105
249 - 144 = 105
As you can see, the halfway number is 105 higher than 39 and 105 lower than 249. Therefore, our halfway between answer of 144 above is correct.
Halfway Between
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Halfway Between 39 and 250
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