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Washington State Math Olympiad Hints and Solutions 2009 Grade 8 Number Sense
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Problem |
1) In the expression below place minus signs "-" and parentheses on the left hand side of the "=" to create a true equation. Note: 2(4 - 1) = 6 and - (2) = -2, (2-1) = 1.
3   4   5   6 = 3
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2) If 23 x 37 x 104 = 6, then what is k?
        (36)k x 54
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3) Ibrahim wants to buy an X-Box elite console that costs $380. His dad says he'll buy it for him with his credit card but Ibrahim has to pay him back. Ibrahim can pay him $10 on the first day of every month. Ibrahim's dad will also charge him 18% annual interest on the unpaid balance at the end of every 12 month cycle (year) so that he can get an idea of how credit cards work. If Ibrahim agrees, how much will he end up paying his dad for the console?
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