Problems of the Week - May 24 to May 29

Rewards for Problems of the week:

5 points for the correct answer at your level; 10 points for the next level; 20 points each for 2+ levels up.

Lower Elementary: 

Question: A starship begins its mission with 100 fuel units. It uses 25 fuel units on the first leg of its mission, 50 fuel units on the second leg of its mission, and 5 units on the last leg of its mission. How many fuel units does the starship have now?

Upper Elementary: 

Question: A fairy has a wingspan of 17 centimeters. That’s the length of both wings completely outstretched. If 5 fairies line up wingtip-to-wingtip, how long would the line of fairies be?

Middle School: 

Question: When it isn’t windy outside, a superhero can fly at 100 miles per hour. Today, the superhero is flying against the wind, which slows him down by 15 miles per hour. How far can the superhero fly in 45 minutes?

 Algebra and Up:

Question: The average speed of an object in motion can be calculated by dividing the distance traveled by the time it takes to get there. A dragon located 39 miles North and 52 miles West of a castle takes flight, flies for 40 minutes, and lands 27 miles South and 36 miles East of the castle. What was the dragon’s average speed in miles per hour?

Challenge problem to take home. 10 points for the correct answer. 

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Nikesh wants to know how much the three textbooks for the math course will cost him. He accidentally multiplied the three prices together and got $1,728.

How much, at least, should he expect to spend in total?