Halfway Between 20 and 290

When you ask "What number is halfway between 20 and 290?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=290.

Halfway Between Line

To find the number halfway between 20 and 290, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 290 into our formula, we get:

(20 + 290)/2 = 155

Thus, the number halfway between 20 and 290 is 155.

To check that our answer is correct, we subtract 20 from 155 and subtract 155 from 290 and compare the two numbers:

155 - 20 = 135
290 - 155 = 135

As you can see, the halfway number is 135 higher than 20 and 135 lower than 290. Therefore, our halfway between answer of 155 above is correct.

Halfway Between
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Halfway Between 20 and 291
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