Question

What number produces an irrational number when multiplied by 2/5

Answer 1

Your answer is Pi
Have good day

Answer 2

Every Irrational Number

Explanation:

Rational Number is the number in the form
`(p)/(q)`, where q≠0.

An irrational number has non-repeating, non-terminating decimal expansion and also we can not write an irrational number in a simple fraction. An irrational number is all real numbers except the rational number.

Example, √2, π, 6.458978445...., etc.

Since
`(2)/(5)` is a rational number for getting the irrational number we should multiply it an irrational number.

Because Product of two rational number is a rational number

and the product of one rational and one irrational number is an irrational number also Product of two irrational number is an irrational number.

For Example:
`√(3)*(2)/(5)` is a irrational number.