Halfway Between 21 and 661

When you ask "What number is halfway between 21 and 661?" 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=661.

Halfway Between Line

To find the number halfway between 21 and 661, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 661 into our formula, we get:

(21 + 661)/2 = 341

Thus, the number halfway between 21 and 661 is 341.

To check that our answer is correct, we subtract 21 from 341 and subtract 341 from 661 and compare the two numbers:

341 - 21 = 320
661 - 341 = 320

As you can see, the halfway number is 320 higher than 21 and 320 lower than 661. Therefore, our halfway between answer of 341 above is correct.

Halfway Between
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Halfway Between 21 and 662
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