Which number can you multiply by any irrational number to obtain an irrational number?
a)
2
b)
8
c)
16
d)
32

The answer is A im guessing

is an irrational number that fits to any scenario, it's impossible to find a number that counteracts it.  The same could be said for all irrational numbers, really.  The figurative answer could be all the numbers, it doesn't matter what you multiply by when it's irrational, it will never change back.

All real numbers are answers.

The reason this is is because the definition of an irrational number is never ending, never repeating. Multiplying it by a rational number will not change the outcome.

I hope this helps, even though my answer isn't listed above. =P