Answer
Natural: $\sqrt 49$ (because the square root of 49 is 7)
Whole: 0, and $\sqrt 49$
Integers: -7, 0, $\sqrt 49$
Rational: All the integers listed above plus -7 and -0.6 (with the bar over the six)
Irrational: $\sqrt 50$
Real: All numbers listed above.
Work Step by Step
Natural Numbers are the set N - 1, 2, 3, 4, ...
Whole numbers just add 0 to the natural numbers.
Integers are the set of natural numbers, their opposites and zero.
Rational numbers may be written as a fraction or as a terminating or repeating decimal.
Irrational numbers have non-terminating, non-repeating decimal representations.
All of the numbers in the list are real numbers.'
Note: The bar over the 6 in -0.6 indicates that the 6 repeats indefinitely
