Rational and Irrational Numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; it cannot be written as a ratio of two integers.

Front

Is the number 0.5 rational or irrational?

Back

Rational

Front

Is the number √2 rational or irrational?

Back

Irrational

Front

What is the square root of 25?

Back

5 (Rational)

Front

Is the number 3.14159 rational or irrational?

Back

Irrational (it is an approximation of π)

Front

What is the decimal representation of a rational number?

Back

It either terminates or repeats.

Front

What is the decimal representation of an irrational number?

Back

It is non-terminating and non-repeating.

Front

Is the number 22/7 rational or irrational?

Back

Rational (it can be expressed as a fraction)

Front

Is the number -3.75 rational or irrational?

Back

Rational