Number Systems

Question 1

Define natural numbers:

Answer 1

A positive whole number including 0

Question 2

Give an example of a natural number:

Answer 2

Any positive integer

Question 3

Mathematical symbol for natural numbers:

Answer 3

Bold N

Question 4

Define integer:

Answer 4

A whole number, positive or negative

Question 5

Give an example of an integer:

Answer 5

Any whole number

Question 6

Mathematical symbol for integers:

Answer 6

Bold Z

Question 7

Define rational numbers:

Answer 7

Any number that can be expressed as a ratio of integers

Question 8

Give an example of a rational number:

Answer 8

Any float that doesn’t go on randomly and infinitely

Question 9

Mathematical symbol for rational numbers:

Answer 9

Bold Q

Question 10

Define irrational numbers:

Answer 10

A number that can’t be expressed as a ratio of integers

Question 11

Give an example of an irrational number:

Answer 11

Root 2, pi

Question 12

Mathematical symbol for irrational numbers:

Answer 12

Bold R \ bold Q or bold R - bold Q

Question 13

Define real numbers:

Answer 13

A number that may have a fractional part, positive or negative

Question 14

Give an example of a real number:

Answer 14

Any number

Question 15

Mathematical symbol for real numbers:

Answer 15

Bold R

Question 16

Define ordinal numbers:

Answer 16

Numbers that denote an order

Question 17

Give an example of an ordinal number:

Answer 17

1st, 2nd, 3rd

Question 18

Define decimal numbers:

Answer 18

Base 10 numbers