
When you ask "What number is halfway between 74 and 684?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=74 and Y=684.

To find the number halfway between 74 and 684, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 74 and 684 into our formula, we get:
(74 + 684)/2 = 379
Thus, the number halfway between 74 and 684 is 379.
To check that our answer is correct, we subtract 74 from 379 and subtract 379 from 684 and compare the two numbers:
379 - 74 = 305
684 - 379 = 305
As you can see, the halfway number is 305 higher than 74 and 305 lower than 684. Therefore, our halfway between answer of 379 above is correct.
Halfway Between
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Halfway Between 74 and 685
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