That's what it sounds like to me too. I actually typed "brem" and it counted correct but as a typo haha.

It's because Swedish speakers colloquially drop 'v' sounds quickly and quitely. 'Vad'(what) for example has only enough v sound in it to tell it starts with one.

Also 'Brief' in Dutch, which means letter

Sounds like a B to me, although the TTS is rarely perfect.

I got this wrong too because it sounded like "drev". I knew it was wrong, but didn't know what else to type. :(

I think what's happening is that the r is trilled.

It sounds like "B". http://zh.forvo.com/word/brev/#sv listen to this

Same question here

No. It's a V sound, but the audio is a little unclear.

The word is one syllable, but we should be aware that, according to this video on the Swedish vowels https://www.youtube.com/watch?v=hzYArZVTD4s&t=2m12s, it is common for the Swedish long e to end in a weak schwa /ə/.

No.

En is used for words that are common gender. Ett is used for words that are neuter gender. You won't be able to tell which is used for a word, just by looking at the word. That's why, when you learn new words, you also have to memorize the article associated to it. For example:

En tidning - A newspaper.

Ett brev - A letter.

As you can see, the two words en and ett, mean exactly the same thing, so that means you have to memorize which words use en and which ones use ett. You can also find more info under the Tips and Notes of Basics 1. Hope that helped!

Sounds OK to me, maybe the v at the end could be clearer.

for me its like" brain " in english

Same here

brevet

Exactly. A letter written to someone.

The pronunciation is perfectly fine. I've spoken native Swedish for over 30 years.