When you ask "What number is halfway between 42 and 149?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=149.
To find the number halfway between 42 and 149, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 149 into our formula, we get:
(42 + 149)/2 = 95.5
Thus, the number halfway between 42 and 149 is 95.5.
To check that our answer is correct, we subtract 42 from 95.5 and subtract 95.5 from 149 and compare the two numbers:
95.5 - 42 = 53.5
149 - 95.5 = 53.5
As you can see, the halfway number is 53.5 higher than 42 and 53.5 lower than 149. Therefore, our halfway between answer of 95.5 above is correct.
Halfway Between
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Halfway Between 42 and 150
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