When you ask "What number is halfway between 65 and 102?" 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=102.
To find the number halfway between 65 and 102, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 65 and 102 into our formula, we get:
(65 + 102)/2 = 83.5
Thus, the number halfway between 65 and 102 is 83.5.
To check that our answer is correct, we subtract 65 from 83.5 and subtract 83.5 from 102 and compare the two numbers:
83.5 - 65 = 18.5
102 - 83.5 = 18.5
As you can see, the halfway number is 18.5 higher than 65 and 18.5 lower than 102. Therefore, our halfway between answer of 83.5 above is correct.
Halfway Between
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Halfway Between 65 and 103
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