When you ask "What number is halfway between 3 and 121?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=121.
To find the number halfway between 3 and 121, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 121 into our formula, we get:
(3 + 121)/2 = 62
Thus, the number halfway between 3 and 121 is 62.
To check that our answer is correct, we subtract 3 from 62 and subtract 62 from 121 and compare the two numbers:
62 - 3 = 59
121 - 62 = 59
As you can see, the halfway number is 59 higher than 3 and 59 lower than 121. Therefore, our halfway between answer of 62 above is correct.
Halfway Between
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Halfway Between 3 and 122
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