Hi, For the branches, you can use the benchmark of your own city: e.g. in my hometown with 500k people I have 1 branch per district. And I can make an assumption about the # of people living in... (more)

# All questions tagged guess-estimates - Consulting Q&A - PrepLounge.com

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Hello, I would propose several ways: 1) You start from the population of the city (12M) and make assumption on a theoritical structure of the demographics : XX% are workers, YY% are students ,... (more)

I would use the population although it will be very sensitive to many assumptions. It looks very difficult to make meaningful assumptions in terms of land size. Cheers Serhat

[Pop US] * [% Female] * [% use makeup] * [% use lipstick] * [# of lipsticks they own] * [1/avg lifetime before finished or stop using] * [$ per lipstick] E.g. 300m people * 50% female * about 6... (more)

Hi, Assume how much time it takes the population to double (let's say 2 years as they need 2 kids). So the population will double 5 times in 10 years Population in 10 years = 2*2^5 Best

How about you provide some ideas and ask for feedback instead of asking others to do your work for you, ("with great details", no less)? A person running a bike shop in London would say: "Bugger of... (more)

Andreas, Case In Point is my favorite resource to practice guesstimate questions. I have used it before joning to BCG 10 years ago. I had 3 guesstimate questions during my interviewing cases. I... (more)

Hallo Anonym A, aus meiner Sicht lässt sich der Brainteaser deutlich einfacher lösen: Ansatz In Deutschland leben ca 83 Mio (runden auf 80 Mio) Menschen Die durchschnittliche Leben... (more)

Hey there For swimming pools Total Pools = # Private Pools + # Public Pools # Private Pools = No. Households who can afford a pool x % Live in A House x % With Pools # Public Pools = Total... (more)

Hi, I would also take into account several factors: What about apartment buildings? Why do you think there are only houses? I would calculate the number of buildings taking into account the a... (more)

Hi, thanks for your question. I think the case is essentially testing your ability to segment a massive concept like 'internet websites' to its components. Below is my answer for this case: Assume... (more)

No expert by any means but in an estimation question is always good to end with a sanity check. In this case, the sanity check could be that according to Dominic Barton (McKinsey's global managing... (more)

Hi, Thanks for the question. I would clarify with the interviewer that these doors are for people to enter/exit buildings before approaching this problem. There are other types of doors out there w... (more)

Hey, I am new to this too, but I think I have some ideas for your problem. Your approach looks good, but I think you have a mistake in how you time the trains. You say that there is one train e... (more)

No expert by any means but this seems like a "fun" problem. I would solve it by doing: 1) If survival rate is 50% in 5 years I assume that per year there is a 10% ppl dying from it. 2) If in... (more)

Hi Marilena, good question. I would always structure such a case completely top down. E.g. in your case, start with the population, then % of people needing glasses, % of those in reach of your... (more)