
When you ask "What number is halfway between 85 and 493?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=85 and Y=493.

To find the number halfway between 85 and 493, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 493 into our formula, we get:
(85 + 493)/2 = 289
Thus, the number halfway between 85 and 493 is 289.
To check that our answer is correct, we subtract 85 from 289 and subtract 289 from 493 and compare the two numbers:
289 - 85 = 204
493 - 289 = 204
As you can see, the halfway number is 204 higher than 85 and 204 lower than 493. Therefore, our halfway between answer of 289 above is correct.
Halfway Between
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Halfway Between 85 and 494
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