When you ask "What number is halfway between 42 and 256?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=256.
To find the number halfway between 42 and 256, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 256 into our formula, we get:
(42 + 256)/2 = 149
Thus, the number halfway between 42 and 256 is 149.
To check that our answer is correct, we subtract 42 from 149 and subtract 149 from 256 and compare the two numbers:
149 - 42 = 107
256 - 149 = 107
As you can see, the halfway number is 107 higher than 42 and 107 lower than 256. Therefore, our halfway between answer of 149 above is correct.
Halfway Between
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Halfway Between 42 and 257
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