When you ask "What number is halfway between 21 and 103?" 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=103.
To find the number halfway between 21 and 103, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 103 into our formula, we get:
(21 + 103)/2 = 62
Thus, the number halfway between 21 and 103 is 62.
To check that our answer is correct, we subtract 21 from 62 and subtract 62 from 103 and compare the two numbers:
62 - 21 = 41
103 - 62 = 41
As you can see, the halfway number is 41 higher than 21 and 41 lower than 103. Therefore, our halfway between answer of 62 above is correct.
Halfway Between
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Halfway Between 21 and 104
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