Number Classifications

Which of the following are natural numbers?

• -6

• 245

• 4

• 0

• 4.35353535...

Which number is the only difference between the set of natural numbers and the set of whole numbers?

• 0

• 1

• -1

Which statements are true for irrational numbers? (Maybe none or maybe only one...)

• Irrational numbers have an infinite number of digits.

• Irrational numbers include many square roots.

• A number may be both irrational and an integer.

• Irrational numbers are not repeating decimals.

Both rationals and irrationals are real numbers.

• True

• False

Which of the following are integers?

• -15

• -2/3

• 0

• Pi = 3.1415926...

• 8.6

The number 3, 8, and 85 are natural numbers, but not integers.

• True

• False

A number that can be written in fractional form is called a _____________ number.

All whole numbers are also natural numbers.

• True

• False

Which of the following are rational numbers?

• 4

• -3

• 5.126126126...

• -1/3

• $\sqrt{19}$

Which of the following symbols is the abbreviation for the set of integers?

• J

• Q

• N

• W

• Irr