When you ask "What number is halfway between 11 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=11 and Y=247.
To find the number halfway between 11 and 247, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 247 into our formula, we get:
(11 + 247)/2 = 129
Thus, the number halfway between 11 and 247 is 129.
To check that our answer is correct, we subtract 11 from 129 and subtract 129 from 247 and compare the two numbers:
129 - 11 = 118
247 - 129 = 118
As you can see, the halfway number is 118 higher than 11 and 118 lower than 247. Therefore, our halfway between answer of 129 above is correct.
Halfway Between
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Halfway Between 11 and 248
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