Engineering Math Challenge Quiz

If a gear with 20 teeth is meshed with a gear with 60 teeth, what is the gear ratio of the smaller gear to the larger gear?

• 1:2

• 1:3

• 3:1

• 2:1

Using the Pythagorean theorem, find the length of the hypotenuse of a right triangle with legs measuring 9 cm and 12 cm.

• 15 cm

• 21 cm

• 10 cm

• 13 cm

If the earth was the size of a penny, how many pennies across would the sun’s diameter be in comparison, given that the sun's diameter is approximately 109 times that of the earth?

• 50 pennies

• 100 pennies

• 109 pennies

• 150 pennies

Considering a cube with equal wall lengths of 18 inches, what would be the longest length an imaginary string could tie from the furthest corners inside the cube?

• 18 inches

• 24 inches

• 30 inches

A machine uses 500 watts of power for 3 hours. How much energy, in kilowatt-hours, does the machine consume?

• 1.5 kWh

• 0.5 kWh

• 3 kWh

• 1 kWh