Math contest/problems-Now Over

[Sillysidley]

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!

[Sillysidley]

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!

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?

[Sillysidley]

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?

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.

[Sillysidley]

There probably won't be a tie

[Sillysidley]

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.

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?

[Sillysidley]

you've gotten all right, well no one else is answering

Say, when do we, or, since no one else is participating, I, get our, er, my, points?