Question

which number produces an irrational number when multiplied by 1/5

Answer 1

Lets solve

Let it be x

$\\ \sf\longmapsto \dfrac{x(1)}{5}=\dfrac{p}{q}$

$\\ \sf\longmapsto \dfrac{x}{5}=\dfrac{p}{q}$

• π is not the answer as its nit a rational no.
• -1.4.. and √11 are also impossible .
• Hence option a is correct