I'm confused about questions with 'Are there' and 'How many'.

First:

I have two questions and two answers during the interview from my textbook.

'Are there many offices?' - There's one head office and there are four other offices in the UK. ‘How many offices are there?’ - ‘There are three in Britain and two in the United States.’

The questions are different but the answers are almoust the same! Why?

Second situation:

‘How many offices are there?’ - ‘There are three in Britain and two in the United States.’

'How many sites are there in the UK?' - 'There's the head office, the other offices, the store branches and our warehouse.'

The answers are different but the questions are the same! Why?