Question

Geetha a tenth class student had written pi as pi by 1 and told that it is a rational number. Do you agree with geetha's argument state the reason

Answer 1

We know that π is a irrational number, And 
Division of any a irrational number and a rational number is a irrational number, so π/1 is also a irrational number
Therefore Geetha is wrong. 

Answer 2

pi is an irrational number and any irrational number divided by 1 is irrational itself.  so pi will be irrational only