When you ask "What number is halfway between 15 and 249?" 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=249.
To find the number halfway between 15 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 249 into our formula, we get:
(15 + 249)/2 = 132
Thus, the number halfway between 15 and 249 is 132.
To check that our answer is correct, we subtract 15 from 132 and subtract 132 from 249 and compare the two numbers:
132 - 15 = 117
249 - 132 = 117
As you can see, the halfway number is 117 higher than 15 and 117 lower than 249. Therefore, our halfway between answer of 132 above is correct.
Halfway Between
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Halfway Between 15 and 250
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