QuoteOriginally posted by: CuchulainnQuoteOriginally posted by: Traden4AlphaQuoteOriginally posted by: CuchulainnI just want to say one word to you - just one word. 'Plastics.' There's a great future in plastics. Think about it. Will you think about it? Shh! Enough said. That's a deal.I thought the answer was "Banach spaces" or has the real estate bubble afflicted normed vector spaces?No, these days it is a Hausdorff space. In topology and related branches of mathematics, a Hausdorff space, separated space or T2 space is a topological space in which distinct points have disjoint neighbourhoods. //(Spanning) trees and forests are a good investment if your horizon is [20, 30] years. Annual rate 10%. Barring tree disease or a comet hitting the forest, it is a reasonably good investment.Do Hilbert nuts grow on spanning trees? Perhaps one can get a lucrative grant from the EU to go beyond B-Trees to create new carbon-absorbing C-Trees.But seriously, this question is one of those "trick" questions that has no single right answer. Depending on the job and the interveiwer, they may be looking for evidence that you are ready to take risks or are extremely cautious about risks. They may be looking for evidence that you are concise and decisive (e.g., know exactly what you would do with the money) or methodical and explanatory (i.e., can spend time explaining how you would evaluate investments and make a careful decision). The point is that your answer should be consistent with the job description, the company, and the interviewer with the proviso that no single answer may be consistent with all three.