Rational/Irrational

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

Give an example of a rational number.

Back

Examples include 1/2, 3, -4, and 0.75.

Front

Give an example of an irrational number.

Back

Examples include π (pi) and √2.

Front

What is a perfect square?

Back

A perfect square is a number that can be expressed as the square of an integer.

Front

Is √25 a rational number?

Back

Yes, √25 = 5, which is a rational number.

Front

Is √16 a rational number?

Back

Yes, √16 = 4, which is a rational number.

Front

Is √12 a rational number?

Back

No, √12 is approximately 3.464, which is an irrational number.

Front

What is the value of √72 rounded to the nearest whole number?

Back

8.

Front

Which of the following is an irrational number: 2.5, 5.72314....., -17, 1/2?

Back

5.72314..... is an irrational number.