When you ask "What number is halfway between 42 and 65?" 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=65.
To find the number halfway between 42 and 65, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 65 into our formula, we get:
(42 + 65)/2 = 53.5
Thus, the number halfway between 42 and 65 is 53.5.
To check that our answer is correct, we subtract 42 from 53.5 and subtract 53.5 from 65 and compare the two numbers:
53.5 - 42 = 11.5
65 - 53.5 = 11.5
As you can see, the halfway number is 11.5 higher than 42 and 11.5 lower than 65. Therefore, our halfway between answer of 53.5 above is correct.
Halfway Between
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Halfway Between 42 and 66
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