Halfway Between 100 and 742

When you ask "What number is halfway between 100 and 742?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=742.

Halfway Between Line

To find the number halfway between 100 and 742, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 742 into our formula, we get:

(100 + 742)/2 = 421

Thus, the number halfway between 100 and 742 is 421.

To check that our answer is correct, we subtract 100 from 421 and subtract 421 from 742 and compare the two numbers:

421 - 100 = 321
742 - 421 = 321

As you can see, the halfway number is 321 higher than 100 and 321 lower than 742. Therefore, our halfway between answer of 421 above is correct.

Halfway Between
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Halfway Between 100 and 743
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