
When you ask "What number is halfway between 85 and 561?" 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=561.

To find the number halfway between 85 and 561, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 561 into our formula, we get:
(85 + 561)/2 = 323
Thus, the number halfway between 85 and 561 is 323.
To check that our answer is correct, we subtract 85 from 323 and subtract 323 from 561 and compare the two numbers:
323 - 85 = 238
561 - 323 = 238
As you can see, the halfway number is 238 higher than 85 and 238 lower than 561. Therefore, our halfway between answer of 323 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 85 and 562
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