#### Answer

a. Natural numbers
$ 6, 913$
b. Whole numbers
$-100, 0, 6, 913$
c. Integers
$-100, 0, 6, 913$
d. Rational numbers
$-100, -\frac{2}{5}, 0, 6, 913$
e. Irrational numbers
$\pi$
f. Real numbers
$-100, -\frac{2}{5}, 0, \pi, 6, 913$

#### Work Step by Step

a. Natural numbers
A positive whole number
b. Whole numbers
A number that is not a fraction
c. Integers
A whole number
d. Rational numbers
A number that can be written as a ratio
e. Irrational numbers
A number that can not be written as a ratio expressed by integers
f. Real numbers
A number that represents a quantity on a line