When you ask "What number is halfway between 25 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=221.
To find the number halfway between 25 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 221 into our formula, we get:
(25 + 221)/2 = 123
Thus, the number halfway between 25 and 221 is 123.
To check that our answer is correct, we subtract 25 from 123 and subtract 123 from 221 and compare the two numbers:
123 - 25 = 98
221 - 123 = 98
As you can see, the halfway number is 98 higher than 25 and 98 lower than 221. Therefore, our halfway between answer of 123 above is correct.
Halfway Between
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Halfway Between 25 and 222
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