Hands-on math!

Washington State Math Olympiad
Hints and Solutions
2015 Grade 5 Measurement
Problem
1) Midas is building a stone wall that will measure 3 ft long and 8 ft tall. He uses blocks measuring 1/8 ft by 1/3 ft by 1/2 ft. He wants the wall to be as thin as possible. How many blocks will he need to build the wall?

2) You have an oven that can cook 5 pizzas in 12 minutes. At this rate, what is the maximum number of pizzas that you can cook in 14 hours?

3) Zona lives in a bubble where time moves 1/3 slower than normal. If a clock in Zona's bubble matches a normal clock at 1:23 pm, what time will a normal clock display when Zona's clock reads 3:51 pm?

Problem

4) Geoff buys boxes of lemonade mix for $3.20. Each box can make 25 cups of lemonade, which he sells for 50 cents per cup. How much profit will he make if he buys and sells 3 boxes of lemonade?

5) Find the area of this figure. (Figure is not to exact scale)