The task is to generate the correct answer for a given math problem.

Q: Problem: how many quarters are equal to 7 dollars ?

A: 28
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Q: Problem: what is the range of all the roots of | x ^ 2 - 4 | = x ?

A: 3
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Q: Problem: if the mean of numbers 28 , x , 42 , 78 and 104 is 62 , then what is the mean of 128 , 255 , 280 , 511 , 1023 and x ?

A:
375.8
****