DGQ 24: Guessing a number between 1 and 100

lock, numbers

Eight years back, at least at the time of publishing this blogpost, Steve Ballmer, former CEO of Microsoft, shared one of his favorite interview questions.

“I’m thinking of a number between 1 and 100. You can guess. After each guess, I’ll tell you whether high or low. You get it the first guess, I give you five bucks. [Second guess], four bucks. Three. Two. One. Zero. You pay me a buck. You pay me two; you pay me three… And the question is, do you want to play or not? What’s your answer?”

While he didn’t go too much in depth on all the answers he’s gotten to it over the years, I imagine different people would have given different proposals on how the game might be played. Of course, the classic engineer is likely to approach it was as an expected value problem.

Most people will lose money. There are far more numbers to guess on which one loses than wins. The question really comes down to… do you know the odds of the game you play?

I find it interesting as an investor to hypothetically ask to founders and/or GPs. That said, I never did. But equally so, I usually spend the first conversation with an entrepreneur (whether the product be software or a fund model) trying to understand a person’s motivations. And, if they understand the rules of the game.

Those who don’t understand the rules will often jump head first in, and take care of the consequences later. Asking for forgiveness than for permission. An attitude that is more excusable in a startup founder than a fund manager.

Those who do understand will take a more measured approach. It’s interesting how little some people understand the game they’re playing. Be it in a two-year financial projection that encapsulates all their assumptions, or a portfolio construction model to understand the enterprise value to return the fund 3X.

For the former, it’s less so of how accurate a financial projection slide is. Hell, your guess is as good as mine. But I always ask founders to unpack it to understand how they’re thinking about the future as a function of their reality today.

For the latter, it’s to understand the true power of the power law, no pun intended. For instance, if you have a $10M fund, writing 20 checks of $500K for 5% ownership. Obviously, I’m assuming a bunch of things for the sake of keeping the math simple. No fees, no recycling, no reserves, and so on. You need to return $50M to 5X your fund. Accounting for 80% dilution, you’ll own 1% on exit. So you need $5B in enterprise value. Given the power law, one of out of the 20 companies should get to at least $3-4B in exit value.

Then again, those who understand the game too well will never take the risk necessary for serendipity to stick.

There’s an interesting blogpost an LP shared with me for my blogpost on evergreen content that VCs and LPs consume. A piece written by the legendary Graham Duncan. “The Playing Field.” A piece I highly recommend reading, even if to shape your own thinking about how the game you play evolves over time. In it, a line worth underscoring.

“[I]t’s the way you learn to play the cards you’ve been dealt, rather than the hand itself, that determines the worth of your participation in the game.”

Photo by Towfiqu barbhuiya on Unsplash


The DGQ series is a series dedicated to my process of question discovery and execution. When curiosity is the why, DGQ is the how. It’s an inside scoop of what goes on in my noggin’. My hope is that it offers some illumination to you, my readers, so you can tackle the world and build relationships with my best tools at your disposal. It also happens to stand for damn good questions, or dumb and garbled questions. I’ll let you decide which it falls under.


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