If you score just right under the passing grade in any of the round, then you'll be put in the 'grey' zone. If you get in the grey zone twice (out of the three rounds), then you fail. I passed the first round but landed in the grey zone for both of the subsequent rounds, which resulted in my getting kicked out. If you want to practice, go to tradertest.org. The sequence test helps but the arithmetic maths test on that site won't help you that much because they don't have fractions, which I find to be the hardest for the first round (the arithmetic online test).