4.5.2 FoDR (Number Systems)

Question 1

What are the Natural numbers and its symbol

Answer 1

All positive whole numbers including zero - N

Question 2

What are the Integer numbers and its symbol

Answer 2

All positive and negative whole numbers including zero - Z

Question 3

What are the Rational numbers and its symbol

Answer 3

Any number that can be expressed as a fraction in the form a/b where a and b are integers - Q

Question 4

What are the Irrational Numbers

Answer 4

Any number that cannot be expressed as a fraction in the form a/b where a and b are integers

Question 5

What are the Real Numbers

Answer 5

Any positive or negative number, that can also contain a fractional part

Question 6

Explain why all integers are rational numbers

Answer 6

Since a number
such as 7 can be written as 7/1, all integers are
rational numbers.

Question 7

What is the set R

Answer 7

the set of all ‘possible real world quantities’

Question 8

Give 2 examples of irrational numbers

Answer 8

sqrt2, pi, e

Question 9

What are ordinal numbers

Answer 9

numbers used to describe numerical position of objects in an array of quantities

Question 10

What are Cardinal Numbers

Answer 10

Numbers used to distinguish the size of an array of quantities

Question 11

What are Natural numbers used for

Answer 11

Counting

Question 12

What are real numbers used for

Answer 12

Measurements