When you ask "What number is halfway between 39 and 105?" 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=105.
To find the number halfway between 39 and 105, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 105 into our formula, we get:
(39 + 105)/2 = 72
Thus, the number halfway between 39 and 105 is 72.
To check that our answer is correct, we subtract 39 from 72 and subtract 72 from 105 and compare the two numbers:
72 - 39 = 33
105 - 72 = 33
As you can see, the halfway number is 33 higher than 39 and 33 lower than 105. Therefore, our halfway between answer of 72 above is correct.
Halfway Between
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Halfway Between 39 and 106
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