When you ask "What number is halfway between 21 and 713?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=713.
To find the number halfway between 21 and 713, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 713 into our formula, we get:
(21 + 713)/2 = 367
Thus, the number halfway between 21 and 713 is 367.
To check that our answer is correct, we subtract 21 from 367 and subtract 367 from 713 and compare the two numbers:
367 - 21 = 346
713 - 367 = 346
As you can see, the halfway number is 346 higher than 21 and 346 lower than 713. Therefore, our halfway between answer of 367 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 21 and 714
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