Halfway Between 90 and 420

When you ask "What number is halfway between 90 and 420?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=90 and Y=420.

Halfway Between Line

To find the number halfway between 90 and 420, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 90 and 420 into our formula, we get:

(90 + 420)/2 = 255

Thus, the number halfway between 90 and 420 is 255.

To check that our answer is correct, we subtract 90 from 255 and subtract 255 from 420 and compare the two numbers:

255 - 90 = 165
420 - 255 = 165

As you can see, the halfway number is 165 higher than 90 and 165 lower than 420. Therefore, our halfway between answer of 255 above is correct.

Halfway Between
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Halfway Between 90 and 421
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