
When you ask "What number is halfway between 10 and 84?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=84.

To find the number halfway between 10 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 84 into our formula, we get:
(10 + 84)/2 = 47
Thus, the number halfway between 10 and 84 is 47.
To check that our answer is correct, we subtract 10 from 47 and subtract 47 from 84 and compare the two numbers:
47 - 10 = 37
84 - 47 = 37
As you can see, the halfway number is 37 higher than 10 and 37 lower than 84. Therefore, our halfway between answer of 47 above is correct.
Halfway Between
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Halfway Between 10 and 85
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