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01-10-2007   #1
Sillysidley

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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

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!
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 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
01-13-2007   #2
Sillysidley

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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!
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Last edited by Sillysidley; 01-13-2007 at 08:57 PM..

 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
 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?
 The Following User Says Thank You to For This Useful Post: zacmarz (02-08-2012)
01-15-2007   #4
Sillysidley

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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?

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 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
 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.
 The Following User Says Thank You to For This Useful Post: zacmarz (02-08-2012)
01-15-2007   #6
Sillysidley

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There probably won't be a tie
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 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
01-15-2007   #7
Sillysidley

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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.
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 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
 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?
 The Following User Says Thank You to For This Useful Post: zacmarz (02-08-2012)
01-15-2007   #9
Sillysidley

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you've gotten all right, well no one else is answering
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 The Following User Says Thank You to Sillysidley For This Useful Post: zacmarz (02-08-2012)
 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?
 The Following User Says Thank You to For This Useful Post: zacmarz (02-08-2012)

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