>>>>
>>>>Steve solved it. I was thinking in the same direction...
>>>
>>>Did he? Why did they give you two balls?
>>
>>Because one ball is not enough :)
>
>Ho ho. Sorry, the way I wrote it sounds like the start of a bad joke! Seriously, why two? Perhaps you can smash them together and have an answer of zero steps

If I would not pass this interview, perhaps, I would do it :)