An Irrational Number is a real number that cannot be written as a simple fraction.
1 The nicotine will totally be gone within 1-3 days after your last using tobacco.  In urine: The urine test normally can detect nicotine level within 3-4 days after the last time you use tobacco. However, if you often smoke or you are passive smokers, nicotine can stay for a period of 15 to 20 days in urine.
Relevance. Rating Newest Oldest. Best Answer: It depends what part of the body you are asking about. BRAIN Your brain becomes free of nicotine within about 40 minutes of your last cigarette URINE If you smoke a couple cigarettes a day, then the nicotine will remain in your urine for three to four days only.