
When you ask "What number is halfway between 21 and 703?" 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=703.

To find the number halfway between 21 and 703, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 703 into our formula, we get:
(21 + 703)/2 = 362
Thus, the number halfway between 21 and 703 is 362.
To check that our answer is correct, we subtract 21 from 362 and subtract 362 from 703 and compare the two numbers:
362 - 21 = 341
703 - 362 = 341
As you can see, the halfway number is 341 higher than 21 and 341 lower than 703. Therefore, our halfway between answer of 362 above is correct.
Halfway Between
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Halfway Between 21 and 704
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