Hands-on math!

Washington State Math Olympiad
Hints and Solutions
2008 Grade 5 Algebra

Problem

1) Tina and Jeff each bike 3 miles to school. Jeff bikes a steady 1/4 of a mile per minute. Tina bikes a steady 1/6 of a mile per minute. When Jeff arrives at school, how far does Tina still have left to bike?
2)
The boy scouts are building bird houses. Michael buys screws and nails for the project. Screws go for 65 cents per pound and the nails go for 30 cents per pound. Michael bought 3 pounds of screws and he spent a total of $4.05. How many pounds of nails did he buy?

3) The colored stripes pattern Red, Blue, Orange, Green, Yellow repeats on wall paper. What will be the color of the 32nd stripe?
4)
Tran loves jellybeans. Every day he eats one more jellybean than the previous day. If Tran ate 15 jellybeans on Saturday, how many total jellybeans did he eat that week if his week began on Monday and ended Saturday?
5)
Sosna is moving. She can carry 16 books at once in her arms to the car. She can also carry 26 DVDs in one load. She doesn't mix books and DVDs to keep things organized. Sosna made 7 trips to the car with arms fully loaded and carried a total of 142 objects. How many DVDs did she carry to the car?