A Person Who Smokes a Pack of Cigarettes a Day Will on Average Lose Two Teeth Every Ten Years

1.  A person who smokes a pack of cigarettes a day will on average lose two teeth every ten years. How many years will it take for a smoker to lose all 32 teeth?

2.  An average adult produces about half a litre of flatulent gas per day, resulting in an average of about fourteen occurrences of flatulence a day. If the average human life expectancy (in Canada) is 78 years, how many litres of gas will a person produce in their lifetime?

3.  By walking an extra 20 minutes every day, an average person will burn off seven pounds of body fat in a year. How many years of walking will it take to burn off 38 pounds of fat?

4.  Each year in America there are about 300,000 deaths that can be attributed to obesity. How many deaths are there due to obesity each second in the US?

5.  Every day the human stomach produces about 2 litres of hydrochloric acid. How much stomach acid will be produced in a human lifetime (see question 2)? How much stomach acid is produced each minute? How many millilitres of stomach acid are produced in a month?

6.  Every day, the average person swallows about a quart (0.946 litres) of snot. How much snot is swallowed in a year?

7.  Every hour one billion cells in the body must be replaced. How many cells are replaced in a second? How many seconds does it take to replace 13.267 billion cells?

8.  Humans breathe in and out approximately one litre of air in ten seconds. How many litres per second? How many millilitres per minute?

9.  In a lifetime, an average human produces 10,000 gallons (1 gallon = 3.785 litres) of saliva. How many litres per day are produced? How many human lifetimes could it take to fill an Olympic –sized swimming pool with saliva if such a pool holds 3,125,001 liters?

10. In a month, a fingernail grows an eighth of an inch. If one inch is equal to 2.54 centimetres, how many long would it take to grow fingernails long enough to go around the world (40076 km)? Express you answer in months and years.

11. Nerve cells can travel as fast as 120 metres per second. How long would it take for a nerve impulse to go from your head to your toe (say, 1.5 metres)? How long would it take a nerve impulse to go around the world (see question above)?

The average ear grows 0.01 inches in length every year. How long would you have to live in order to grow ears 1.7 metres long?