Number Systems

Question 1

What are natural numbers and give an example.

Answer 1

Natural numbers are positive whole numbers that can be used for counting. N = {0,1,2,3,4…}

Question 2

What are integer numbers and give an example.

Answer 2

Integer numbers can be positive or negative whole numbers. Z = {…-2,-1,0,1,2…}

Question 3

What are rational numbers and give an example.

Answer 3

Rational numbers are numbers that can expressed as a fraction or in a ratio. Q = {…100/2, 3/7…}

Question 4

What are irrational numbers and give an example.

Answer 4

Irrational numbers are numbers that cannot be expressed in a fraction or ratio. Q’ = {…pi, root 2 …}

Question 5

What are real numbers and give an example.

Answer 5

Real numbers are any value that is a natural, integer, rational or irrational number. R = {…2, 24/5, pi, -30…}

Question 6

What are ordinal numbers and give an example.

Answer 6

Ordinal numbers are used to express the position of an item in an ordered list or sequence. 1st 3rd 6th
-For example an index of an item in an array