Number systems

Question 1

Definition of a natural number

Answer 1

Made up of decimal digits

Question 2

What represents natural numbers

Answer 2

N

Question 3

Definition of an integer

Answer 3

Whole number, positive or negative, includes 0

Question 4

What represents integers

Answer 4

Z

Question 5

Definition of a rational number

Answer 5

Can be expressed as a fraction, denominator cannot be 0

Question 6

What represents rational numbers

Answer 6

Q

Question 7

Definition of an irrational number

Answer 7

Any number that cannot be represented as a ratio of an integer

Question 8

What represents irrational numbers

Answer 8

R-Q

Question 9

Give an example of an irrational number

Answer 9

Pi

Question 10

Definition of a real number

Answer 10

Any positive or negative value including a fractional part, including integers, rational and irrational numbers

Question 11

What is a real number represented by

Answer 11

R

Question 12

Definition of an ordinal number

Answer 12

Identifies the position of something in a list

Question 13

Difference between natural numbers and integers

Answer 13

Natural - above 0
Integer - below, above and including 0

Question 14

Difference between rational and irrational numbers

Answer 14

Rational - can be expressed as a fraction
Irrational - cannot be expressed as a fraction