When you ask "What number is halfway between 21 and 361?" 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=361.
To find the number halfway between 21 and 361, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 361 into our formula, we get:
(21 + 361)/2 = 191
Thus, the number halfway between 21 and 361 is 191.
To check that our answer is correct, we subtract 21 from 191 and subtract 191 from 361 and compare the two numbers:
191 - 21 = 170
361 - 191 = 170
As you can see, the halfway number is 170 higher than 21 and 170 lower than 361. Therefore, our halfway between answer of 191 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 21 and 362
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