
When you ask "What number is halfway between 1 and 125?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=1 and Y=125.

To find the number halfway between 1 and 125, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 125 into our formula, we get:
(1 + 125)/2 = 63
Thus, the number halfway between 1 and 125 is 63.
To check that our answer is correct, we subtract 1 from 63 and subtract 63 from 125 and compare the two numbers:
63 - 1 = 62
125 - 63 = 62
As you can see, the halfway number is 62 higher than 1 and 62 lower than 125. Therefore, our halfway between answer of 63 above is correct.
Halfway Between
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Halfway Between 1 and 126
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