Just three questions

I once interned at a VC firm. At this firm, potential startup investments flowed through rapidly, and it could sometimes be difficult evaluate every single opportunity. Faced with such a task, the associate tasked with looking at these opportunities assessed them using just one, simple rule of thumb: if you had to ask just three questions of the opportunity, what would they be?

It's a simple rule of thumb, but one that applies to opportunities beyond just looking at companies: if you could ask a customer just three things, what would they be? If you had to build just three product features, what would they be?

Which three questions will help you prioritize and get clarity on what you're working on?