
When you ask "What number is halfway between 84 and 742?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=742.

To find the number halfway between 84 and 742, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 742 into our formula, we get:
(84 + 742)/2 = 413
Thus, the number halfway between 84 and 742 is 413.
To check that our answer is correct, we subtract 84 from 413 and subtract 413 from 742 and compare the two numbers:
413 - 84 = 329
742 - 413 = 329
As you can see, the halfway number is 329 higher than 84 and 329 lower than 742. Therefore, our halfway between answer of 413 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 84 and 743
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