Which number produces an irrational number when added to 0.4

QUESTION POSTED AT 29/05/2020 - 01:21 AM

Answered by admin AT 29/05/2020 - 01:21 AM

Any other irrational number. 0.4 is rational (ie., it can be written as a fraction), but rational+irrational is always irrational.

So examples would be π or √2. If you add those, the result is irrational.
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