When you ask "What number is halfway between 42 and 140?" 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=140.
To find the number halfway between 42 and 140, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 140 into our formula, we get:
(42 + 140)/2 = 91
Thus, the number halfway between 42 and 140 is 91.
To check that our answer is correct, we subtract 42 from 91 and subtract 91 from 140 and compare the two numbers:
91 - 42 = 49
140 - 91 = 49
As you can see, the halfway number is 49 higher than 42 and 49 lower than 140. Therefore, our halfway between answer of 91 above is correct.
Halfway Between
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Halfway Between 42 and 141
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