Using Code Words/mixed Operations Worksheets With Answer Key Page 5
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16Brain
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• • • • • • • • • • • • • • • • • Brain Challengers
Teasers
Directions: Do these brain teasers in small groups or pairs. Use paper and pencil to draw out your
ideas or make your calculations.
1. Mike started a new job in March. Which would be better: an annual pay raise of $2,000 or a raise
of $500 every six months? _____
2. If a piece of paper is 0.0001 inch thick, how tall of a pile would it make if the number of papers
were doubled 50 times? _____
3. Mr. Burton went to the hardware store. “How much are these?” he asked the clerk. “$0.25 each,”
came the reply. “OK, I’ll take 100,” Mr. Burton said. He paid only $0.75. What did he buy?
_____
4. “Summertime Fun Juice” comes in a returnable bottle for $1.60. The juice costs $1.20 more than
the bottle. You can return the empty bottle for a refund. How much should you receive? _____
5. In Justin, Minnesota, 90% of the people drink coffee and 80% drink tea. Also, 70% drink apple
juice and 60% drink orange juice. None of the people drink all four beverages, but they all drink
three of the four. What percent of them drink juice? _____
6. Little Bobby Jenks compared candy bars. Choco-Chunk was 50% more expensive than Goodie
Two-Shoes and contained 20% less weight than Nuts to U. However, Nuts to U was 50% heavier
than Goodie Two-Shoes and cost 25% more than Choco-Chunk. Which is the best buy? _____
7. Ajax car rental charges $35.00 per day and $0.45 per mile to rent their cars. How many miles can
you drive and still keep the cost under $125.00 per day? _____
8. At Dorothy’s Drapes, a saleswoman is paid a salary of $300.00 plus a 40% sales commission.
How much does she have to sell to make $2,000.00? _____
9. Hometown wants to hold a fundraiser for a new auditorium. A band called the Rave-Ups, offers
to give one concert for $10,000 and 20% of the ticket receipts. About 10,000 teenagers will
attend. What admission price will Hometown have to charge just to break even? _____ What
admission price would Hometown have to charge to earn a profit of $25,000? _____
Summer Camp Save-Up
10. Hal wants to attend camp in Troy, Wisconsin. He needs to have $350.00 to pay his way for two
weeks. He has started mowing lawns and saving money. Fill in each blank.
a. The first week he saved 4% of his goal: _____________________
b. The second week he saved 12% of his goal: _____________________
c. The third week he saved 15% of his goal: _____________________
d. The fourth week he saved 25% of his goal: _____________________
e. The fifth week he saved 14% of his goal: _____________________
f. The sixth week he saved 30% of his goal: _____________________
Was Hal able to pay his way to summer camp? _____________________
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