When you ask "What number is halfway between 74 and 172?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=74 and Y=172.
To find the number halfway between 74 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 74 and 172 into our formula, we get:
(74 + 172)/2 = 123
Thus, the number halfway between 74 and 172 is 123.
To check that our answer is correct, we subtract 74 from 123 and subtract 123 from 172 and compare the two numbers:
123 - 74 = 49
172 - 123 = 49
As you can see, the halfway number is 49 higher than 74 and 49 lower than 172. Therefore, our halfway between answer of 123 above is correct.
Halfway Between
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Halfway Between 74 and 173
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