
When you ask "What number is halfway between 65 and 87?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=65 and Y=87.

To find the number halfway between 65 and 87, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 65 and 87 into our formula, we get:
(65 + 87)/2 = 76
Thus, the number halfway between 65 and 87 is 76.
To check that our answer is correct, we subtract 65 from 76 and subtract 76 from 87 and compare the two numbers:
76 - 65 = 11
87 - 76 = 11
As you can see, the halfway number is 11 higher than 65 and 11 lower than 87. Therefore, our halfway between answer of 76 above is correct.
Halfway Between
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Halfway Between 65 and 88
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