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 01-10-2007 #1 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 Math contest/problems-Now Over I'm thinking of holding a contest sort of thing where there are going to be 6 rounds of 5 questions each, and at the end the top 3 winners will recieve 5000, 4000, and 3000 points respectively just private message me your answers only people in grades 8 and under can join! i will post the first round in a few days, and i will wait for 5 days for people to message me the answers! Hopefully it will work out! __________________ .
 01-13-2007 #2 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 the first contest private message me the answers you get... 1. If x=2, y=-3, and z=-12, what is xy-z+xz? 2. If there was a class of 923 people who had a test, and whoever score above the average get a treat, what is the highest number of people who can get a treat? There is no rounding involved, the average can be a decimal with a billion decimal places for all i care. 3. If someone wakes up at x a.m., and goes to sleep at x p.m., how long does he stay up? 4. If x=y, what is x to the power of x-y?x and y do not equal 0. 5. What is the y-intercept of the line x=5y-17? These could be hard, but its a waste of time to have an easy contest! __________________ . Last edited by Sillysidley; 01-13-2007 at 09:57 PM..
 01-13-2007 #3 Temperal Guest   Posts: n/a Hard? Don't make me laugh. Tricky is the word you're looking for. I have a question, though. What if there's a tie?
 01-15-2007 #4 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 good job you got them all right! Here's the next set (people can still PM me the answers for the first) 1. What is the units digit of 7*9*11...*1999*2001*2003 2. What is the base 10 representation of 510 base 5? 3. If f(2x+1)=(x-7)(x+5), what is f(63)? 4. How many toatal degrees are in a pentagon? 5. There is a n-sided figure with 10n diagonals? How many diagonals does it have? What about this Archive? __________________ .
 01-15-2007 #5 Temperal Guest   Posts: n/a All right, I've answered. These are harder than last time's. You still haven't answered my question, which is the reason that I am posting again. Ahem.
 01-15-2007 #6 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 There probably won't be a tie __________________ .
 01-15-2007 #7 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 Contest number 3:Super Hard! This will probably be hard. 1. A triangle ABC has sides x,x+2, and 4. Cos (angle bac)=(x+8)/(2x+4). Determine all posible values of x. Write your proof when you send this. 2.On planet X, aliens us the same operations we do (+,-,*, and /) and an operation @. Scientists have determined that the following are true for all rl numbers a and b. a@0=a a@b=b@a (a+1)@y=(a@y)+y+1 what is 12@5? 3. What is 16^-3/4 (16 to the power negative 3/4) 4. An aquarium has a rectangular base that measures 100cm by 40cm, and a height of 50cm. The aquarium is filled to a depth of 37 cm. A rock with volume 1000cm^3 is put in the aquarium and completely submerged. By how amny cm does the water level rise? 5. Pete sells 3 tacos and 2 sandwiches for \$5.15. He also sells 3 sandwiches and 2 tacos for \$2. 85. How much does 2 tacos and 1 sandwich cost for? Assume there is a fixed rate. __________________ .
 01-15-2007 #8 Temperal Guest   Posts: n/a Could you go a bit slower? You said one every five days, but you've already posted 2 today! How about one every day? By the way, how many did I get wrong?
 01-15-2007 #9 Sillysidley Last Achievements   Join Date: Oct 2006 Posts: 822 you've gotten all right, well no one else is answering __________________ .
 01-15-2007 #10 Temperal Guest   Posts: n/a Say, when do we, or, since no one else is participating, I, get our, er, my, points?

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