How long do such projects take?

Question

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Got a job as a frontend developer.
At the interview, they asked the question: how much time will it take you to do such projects?
ekaterinavoronova.com
credit.skow.ru
gogolschool.ru
anprom.ru
I said that each one takes a couple of days.
As a result, the work was refused, but I wanted to ask how, in your opinion, it was necessary to answer.

Answer 1

From a few hours to a working day, depending on the specific site.

Answer 2

For me it will be:
1st: 6.
2nd 8 hours.
3rd 12-14 hours.
4th 8h.
But it happens in different ways, sometimes faster, and sometimes longer (than thought), no one can say for sure.