nerdsforever
hsc zomg
- Joined
- Jan 10, 2008
- Messages
- 464
- Gender
- Female
- HSC
- 2010
Re: How did people go in the maths comp today?
damn, I put (c) for question 18
damn, I put (c) for question 18
By inspection:Yes, YOU'RE MY MAN! =] Not sure bout how I went on some of the other qs....
also that parabola was dodgy... I was originally thinking that it was a difference of two squares (it looked like the roots/zeroes were equal negative) - but then again never trust scale.
25/9, how did half your class get that one wrong?By inspection:
a < 0
0 < c
b = 0
a + b < c [summing them]
a + b - c < 0
LOL, what did u guys put for question 4? Half my class got it wrong
Lol, you should have done the cheap way and folded paper or somethingI got the map one wrong, so no hard feelings xD
It's a red herring I guess, just throws people off when they get too cocky.25/9, how did half your class get that one wrong?
Those are reducibleq 25) for the f(x) n-fold question i'm sure the answer was 2
for fn(x) = x
Linear/linear=x
making a quadratic resulting in 2 solutions
e.g. (x + 6)/x = x
x^2=x+6
X^2 - x - 6 =0
(x-3)(x+2)=0
two solution x=3, -2
q 18) Answer is 4, i think
Find the numbers which multiply to become 60 (2 numbers only)
2 and 30
3 and 20
6 and 10
15 and 4
5 and 12
1 and 60
Using reciprocals you will get three to have 60 as the denominator
e.g. 2/30 + 30/2 = ....
6/10 + 10/6 = .....
Bleh, I know! What mark you aiming for official?Lol, you should have done the cheap way and folded paper or something
80 but I think I got somewhere around 75Bleh, I know! What mark you aiming for official?
I think i'm capped at 75, so I suppose i'll aim for that xD80 but I think I got somewhere around 75
how bout you?
Lolokay got 48. Drawing a net helps with these types of questions.For 28 did anyone get 27?
q 28 is the regular octahedron shape with 6cm edges
The last 3 were so hard, didn't even bother with them after reading them over.Does anybody have an idea for the q30? Knowing the properties of 2009 didn't seem to help me much >< and 28 was obscure, possibly poor wording/ comprehension...
I was really close to the last one but the "no congruence" nugget was a kick in the balls.The last 3 were so hard, didn't even bother with them after reading them over.
haha, I was reading the question and when the question stated the number "2009" I was just like, I'm not wasting my time thereI was really close to the last one but the "no congruence" nugget was a kick in the balls.