When you ask "What number is halfway between 42 and 191?" 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=191.
To find the number halfway between 42 and 191, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 191 into our formula, we get:
(42 + 191)/2 = 116.5
Thus, the number halfway between 42 and 191 is 116.5.
To check that our answer is correct, we subtract 42 from 116.5 and subtract 116.5 from 191 and compare the two numbers:
116.5 - 42 = 74.5
191 - 116.5 = 74.5
As you can see, the halfway number is 74.5 higher than 42 and 74.5 lower than 191. Therefore, our halfway between answer of 116.5 above is correct.
Halfway Between
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Halfway Between 42 and 192
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