Hello,

You are right, it's quite impossible to make a reliable estimation.

That being said, you have to enter the logic that your interviewer is not interested in the answer, sometimes he doesn't even know the answer. This is a perfect example of when you interviewer wants just to test your problem solving skills and see how you work under pressure.

In these cases, you have to:

- Deline a strategy and expose it to your interviewer, making clear each step and being really careful to his potential inputs
- Estimate each number doing an educate guess, everytime involving the interviewer in your reasoning
- Do the calculations

Point 2 is crucial and it doesn't matter what is the number that you propose: it has only to be justified in a rational way.

Hope it helps,

Luca

Hello,

You are right, it's quite impossible to make a reliable estimation.

That being said, you have to enter the logic that your interviewer is not interested in the answer, sometimes he doesn't even know the answer. This is a perfect example of when you interviewer wants just to test your problem solving skills and see how you work under pressure.

In these cases, you have to:

- Deline a strategy and expose it to your interviewer, making clear each step and being really careful to his potential inputs
- Estimate each number doing an educate guess, everytime involving the interviewer in your reasoning
- Do the calculations

Point 2 is crucial and it doesn't matter what is the number that you propose: it has only to be justified in a rational way.

Hope it helps,

Luca