Question

I am student of class 9 and i am confused in how to determine a number is rational or irrational?

Please help me .

Answer 1

Rational
In mathematics, a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number. ... A real number that is not rational is called irrational.

Irrational
A number that cannot be expressed as a ratio between two integers and is not an imaginary number. If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. Pi and the square root of 2 (√2) are irrational numbers.

Hope it helps

Answer 2

A number is rational if it's terminating and repeating for example 3. A number is irrational if is non terminating (endless). For example
$\sqrt{3}$