When you ask "What number is halfway between 42 and 259?" 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=259.
To find the number halfway between 42 and 259, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 259 into our formula, we get:
(42 + 259)/2 = 150.5
Thus, the number halfway between 42 and 259 is 150.5.
To check that our answer is correct, we subtract 42 from 150.5 and subtract 150.5 from 259 and compare the two numbers:
150.5 - 42 = 108.5
259 - 150.5 = 108.5
As you can see, the halfway number is 108.5 higher than 42 and 108.5 lower than 259. Therefore, our halfway between answer of 150.5 above is correct.
Halfway Between
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Halfway Between 42 and 260
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