When you ask "What number is halfway between 31 and 242?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=31 and Y=242.
To find the number halfway between 31 and 242, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 242 into our formula, we get:
(31 + 242)/2 = 136.5
Thus, the number halfway between 31 and 242 is 136.5.
To check that our answer is correct, we subtract 31 from 136.5 and subtract 136.5 from 242 and compare the two numbers:
136.5 - 31 = 105.5
242 - 136.5 = 105.5
As you can see, the halfway number is 105.5 higher than 31 and 105.5 lower than 242. Therefore, our halfway between answer of 136.5 above is correct.
Halfway Between
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Halfway Between 31 and 243
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