When you ask "What number is halfway between 63 and 511?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=63 and Y=511.
To find the number halfway between 63 and 511, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 511 into our formula, we get:
(63 + 511)/2 = 287
Thus, the number halfway between 63 and 511 is 287.
To check that our answer is correct, we subtract 63 from 287 and subtract 287 from 511 and compare the two numbers:
287 - 63 = 224
511 - 287 = 224
As you can see, the halfway number is 224 higher than 63 and 224 lower than 511. Therefore, our halfway between answer of 287 above is correct.
Halfway Between
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Halfway Between 63 and 512
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