1. What is the average number of microorganisms in the human body?
a) 1 trillion
b) 10 trillion
c) 35 trillion
d) 1 quadrillion
2. How much length can a person’s fingernail grow per month on average?
a) 1 mm
b) 2 mm
c) 3 mm
d) 4 mm
3. What special phenomenon is associated with artists Vincent van Gogh and Franz Liszt?
a) Color blindness
b) Chromesthesia
c) Hearing impairment
d) Hypersensitivity to touch
4. What is the fastest speed at which signals can travel in the human brain per hour?
a) 100 km
b) 200 km
c) 300 km
d) 460 km
5. How many sweat glands are there on a person’s foot approximately?
a) 100,000
b) 500,000
c) 1 million
d) 2 million