The first boy or girl who (answer) _________ all the questions is to receive the singer's new album.
Can you give me the correct tense for it?
In my opinion, "answers" sounds OK because it looks like a conditional sentence. Is it right?
I hope to receive answers from you. Thanks
Not a teacher.
I too think so.
So why does the key in my book give me the answer "Will answer". Is it correct, too? And why?
No, it's not correct. I have no idea why it would give that. In that situation, we use the present tense to express the future. I'm also not very happy with "is to". The sentence would be far more natural as:
The first boy or girl who correctly answers all the questions will receive/win a copy of the singer's new album.
This is the kind of error that, unfortunately, we find in grammar books all the time. If they're not written by native speakers, mistakes slip in.
No. It's not a question.
It's a polite suggestion. Many years ago, teachers would insist that it was phrased as a question, and so we must use a question mark. However, in speech it does not have the intonation of a question, and most people do not now use the question mark.
ps. There are no 'sirs' or 'madams' in this forum. It's fine to use no form of address, or to use the username of the person you are addressing.
Context is always important; labelling is rarely important.