Rational and Non-Rational Numbers - JSS3 Mathematics Past Questions and Answers - page 1
Which property distinguishes irrational numbers from rational numbers?
They can be expressed as fractions.
Their decimal expansions are non-terminating and non-repeating.
They are always negative.
They are multiples of whole numbers.
Which of the following is an example of an irrational number?
3
4
0.333...
22
0.5
What is a necessary condition for a number to be rational?
Its decimal expansion terminates.
Its decimal expansion is non-terminating and non-repeating.
It can be expressed as a fraction of two integers.
It must be a whole number.
Determine whether 0.75 is a rational or irrational number.
To determine the nature of 0.75:
Step 1:
0.75 is a terminating decimal.
Step 2: Terminating decimals are characteristic of rational numbers.
0.75 is a rational number.