Question

whats a irrational number

Answer 1

how about \(\pi\)?

Answer 2

A rational number can be written as a fraction. An irrational number cannot.
Any fraction is rational. Any integer is rational. Any terminating decimal number is rational. Any repeating decimal number is rational.

Answer 3

any number that CANNOT be written as the ratio of two integers, i.e cannot be written as \(\frac{a}{b}\) where \(a\) and \(b\) are integers

Answer 4

Both @satellite73 and @SmoothMath are right. I don't know to whom I should give the medal :P

Answer 5

I thought snackman wanted an example :P

Answer 6

@KingGeorge too is also right. Looks like inky pinky ponky :P

Answer 7

an irrational # is non-terminating