# Problems of the Week

Apr 20, 2020 | High Park

TEST YOUR BRAIN WITH THIS WEEK'S SET OF PROBLEMS!

Lower Elementary:
Question: Kylie sold books at a yard sale for 10¢ each and toys for 50¢ each. If she sells 6 books and 3 toys, how much does Kylie earn altogether?

Upper Elementary:
Question: Eight groups of children are performing skits at their summer camp comedy show. Each skit is 5 minutes long. If each group performs once and the campers must be done with the comedy show by 9:15 PM, then what is the latest time they can start the show?

Middle School:
Question: A 9-foot tree casts a 6-foot shadow. Cameron’s dog casts a 2-foot shadow. Cameron is twice as tall as the dog. How tall is Cameron?

Algebra and Up:
Question: The profit earned by a coffee company, measured in thousands of dollars, is modeled by the function f(t) = t2 – 8t + 16, wherein t is measured in months and t = 1 is January 2012. What month does the coffee company earn the least amount of money? How much do they earn?

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Lower Elementary:

Solution: Kylie earned 10¢, 6 times for the books. That’s 10, 20, 30, 40, 50, 60¢. She earned 50¢, 3 times for the toys. That’s 50, 100, 150¢, or \$1.50. So, altogether, Kylie earned \$1.50 + \$0.60 = \$2.10.

Upper Elementary:

Solution: The amount of time is takes for all of the groups to finish their skits is 8 × 5 = 40 minutes. Since they have to finish the show by 9:15 PM, we count back 40 minutes before 9:15 PM to 8:35 PM.

Middle School: