When you ask "What number is halfway between 23 and 291?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=291.
To find the number halfway between 23 and 291, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 291 into our formula, we get:
(23 + 291)/2 = 157
Thus, the number halfway between 23 and 291 is 157.
To check that our answer is correct, we subtract 23 from 157 and subtract 157 from 291 and compare the two numbers:
157 - 23 = 134
291 - 157 = 134
As you can see, the halfway number is 134 higher than 23 and 134 lower than 291. Therefore, our halfway between answer of 157 above is correct.
Halfway Between
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Halfway Between 23 and 292
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