SOLUTION: To which subsets of real numbers does the number 25 and √94 belong?

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Question 1094429: To which subsets of real numbers does the number 25 and √94 belong?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
To which subsets of real numbers does the number 25 and √94 belong?
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List the possible subsets, then cross off the ones that don't fit.
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eg, sqrt(2) is not rational.

Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.
The number 25 belongs to subsets

    - natural numbers;
    - integer numbers;
    - rational numbers.    // and to many other subsets: {positive real numbers}; {odd integer numbers};  {integers multiple of 5}  and so on . . . 


The number sqrt%2894%29 belongs to the subset of irrational numbers.