When you ask "What number is halfway between 65 and 129?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=65 and Y=129.
To find the number halfway between 65 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 65 and 129 into our formula, we get:
(65 + 129)/2 = 97
Thus, the number halfway between 65 and 129 is 97.
To check that our answer is correct, we subtract 65 from 97 and subtract 97 from 129 and compare the two numbers:
97 - 65 = 32
129 - 97 = 32
As you can see, the halfway number is 32 higher than 65 and 32 lower than 129. Therefore, our halfway between answer of 97 above is correct.
Halfway Between
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Halfway Between 65 and 130
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