Yes .... assume RVSM unless the question says otherwise ..... and there are about 4 questions that say ... 'ignoring RVSM' ...

So, RVSM ... makes things easier

going EAST - an ODD level (mathematically ODD) all the way up to FL 410

going WEST - an EVEN level (mathematically EVEN)) all the way up to FL 400

Above FL 410 ... revert to ICAO - ie as per schematic on the front of the E(HI) 4/5