4.5.1 Number Systems

Question 1

What are ordinal numbers?

Answer 1

A number defining the position of something in a series, such as ‘first’, ‘second’, or ‘third’. Ordinal numbers are used as adjectives, nouns, and pronouns.

Question 2

What numbers do we use for counting?

Answer 2

Natural numbers

Question 3

What numbers do we use for measurement?

Answer 3

Real numbers

Question 4

What are the 5 types of numbers that can come up in the exam?

Answer 4

Natural numbers (N)
Integer numbers (Z)
Real numbers (R)
Rational numbers (Q)
Ordinal numbers