Can you pass your drug test 10days after you snort crystal meth?

Yes, i have had two nurses tell me that i "could" pass a test in two days, as i do not do cocaine often. Also, i was tested 8 days after i had about 2 g's one night, however, it had been about a month before that night when i did it before. I luckily landed a better job kind of outa nowhere, and the next employer gave me a sealed envelope and an address to go to the next Saturday before i came to work. I did however drink a large quantity of water and i ran on the track team. But for me i can say yes you only need to study for 9 days before the test