Fermi Questions Practice

How many milk cows are in the US?

• 3

• 6

• 7

• 8

125!

• 200

• 209

• 300

• 305

How many board game dice does it take to equal the mass of the average human?

• 2

• 3

• 4

• 5

How many SO (Scientificus olympiadum) bacteria would be able to be packed into a ping pong ball?

• 13

• 15

• 11

• 10

What is the diameter of a DNA molecule in inches?

• -2

• -4

• 4

• -7

How many electrons pass through a 100 watt light bulb in a minute?

• 18

• 19

• 20

• 22

How many breaths does the average US adult take in a lifetime?

• 5

• 7

• 10

• 15

If we could brew coffee in swimming pools, how many pools would be required to satisfy the need in the US on a given day?

• 4

• 3

• 2

• 1

How many automobiles had General Motors produced as of this date in 1968?

• 8

• 6

• 10

• 4

What is the surface area of an iPhone in hectares?

• -3

• -7

• -2

• -6