When you ask "What number is halfway between 15 and 247?" 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=247.
To find the number halfway between 15 and 247, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 247 into our formula, we get:
(15 + 247)/2 = 131
Thus, the number halfway between 15 and 247 is 131.
To check that our answer is correct, we subtract 15 from 131 and subtract 131 from 247 and compare the two numbers:
131 - 15 = 116
247 - 131 = 116
As you can see, the halfway number is 116 higher than 15 and 116 lower than 247. Therefore, our halfway between answer of 131 above is correct.
Halfway Between
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Halfway Between 15 and 248
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