6.263 - Rational number

911 - Whole number
4.56666.... - Rational number
36−−√ - Rational number
0 - Whole number
−25 - Whole number
42−−√ - Rational number
IS THISS CORRECT?

No, the statement "36−−√ - Rational number" is incorrect. The square root of 36 is 6, which is a rational number.