When you ask "What number is halfway between 15 and 185?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=185.
To find the number halfway between 15 and 185, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 185 into our formula, we get:
(15 + 185)/2 = 100
Thus, the number halfway between 15 and 185 is 100.
To check that our answer is correct, we subtract 15 from 100 and subtract 100 from 185 and compare the two numbers:
100 - 15 = 85
185 - 100 = 85
As you can see, the halfway number is 85 higher than 15 and 85 lower than 185. Therefore, our halfway between answer of 100 above is correct.
Halfway Between
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Halfway Between 15 and 186
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