When you ask "What number is halfway between 42 and 684?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=684.
To find the number halfway between 42 and 684, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 684 into our formula, we get:
(42 + 684)/2 = 363
Thus, the number halfway between 42 and 684 is 363.
To check that our answer is correct, we subtract 42 from 363 and subtract 363 from 684 and compare the two numbers:
363 - 42 = 321
684 - 363 = 321
As you can see, the halfway number is 321 higher than 42 and 321 lower than 684. Therefore, our halfway between answer of 363 above is correct.
Halfway Between
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Halfway Between 42 and 685
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