choose the letter of the best answer. 1. the number 9 is NOT an element of the _______.
a. irrational b. rational
c. integers d. counting numbers

2. whole numbers and their opposites from the set of ________.
a. whole numbers b. natural numbers c. counting numbers d. integers

3. whole numbers differ from counting numbers because of _________.
a. 1 b.0 c. 10 d.-1.

4.the square root of 31 is an element of the set of ________.
a. natural numbers
b. counting numbers
c. rational numbers
d. irrational numbers

5. counting numbers are also known as ______.
a. integers
b. natural numbers
c. rational numbers
d. irrational numbers.

6. the number 0.098709870987... is an element of the set of ______.
a. counting numbers.
b. integers
c. rational numbers
d. irrational numbers

7. which set of numbers is the most appropriate for displaying outdoor temperature in countries with four seasons?
a. rational numbers
b. whole numbers
c. integers
d. irrational numbers

8. -√4 belongs to the set of ______.
a. natural numbers
b. whole numbers
c. integers
d. irrational numbers

9. 0.4444... belongs to the set of _____. a. integers
b. rational numbers
c. irrational numbers
d. whole numbers

10. √2, √101, and π are examples of _______.
a. natural numbers
b. whole numbers
c. rational numbers
d. irrational numbers ​