Question

Identify the number that does not belong with the other three. Explain your reasoning

Answer 1

radical 50 is an irrational number.

Answer 2

An irrational number is any real number that cannot be expressed as a ratio of integers.

radical 50 is\[\sqrt{50} \] http://en.wikipedia.org/wiki/Irrational_number

Answer 3

so that's the answer

Answer 4

Yes. The other numbers are rational.
For example, 50.1 can be written as 501/10
50/2 is rational.