RealiseNothing
what is that?It is Cowpea
That was in my School Trials lol, I'm guessing you did the same one as me.
SC mathematics Marathon (1 Viewer)
- Thread starter dionb2014
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haha ooh~ what mark did you get?
Some Vunt
Banned
Lol, what?
Isn't it 7/15?
Prime numbers: 1, 2, 3, 5, 7, 11, 13
Therefore: 7 possible prime numbers
Total possible numbers: 1, 2, 3, …, 15 = 15
therefore probability = 7/15
haha silly! I got that question wrong as well. 1 isn't actually a prime number.. I was pretty annoyed afterwards when I found out lol.
This.
RealiseNothing
what is that?It is Cowpea
97, read a question wrong and lost 3 marks
, should of had 100@1 not being a prime
They don't consider 1 to be a prime anymore because it means that there are infinite prime products of any non-prime integer.
For example: 10 can be written as 5 times 2, so it has 1 product of just primes. But if 1 were a prime, then we could say 5 times 2, 5 times 2 times 1, 5 times 2 times 1 times 1, and so on, meaning it would be infinite.
big_bang344
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Do you guys know what we have to get in order to get a band 6?
Some Vunt
Banned
Hahah. No wonder I failed MX2 last week.
I got 96 on the SC though. Which I think was the highest or second highest at school and I didn't study and I came ~20th in the in school assessments. So, SC is pretty easy, don't stress.
Btw, I thought the definition of a prime number was a number that only had a factor of 1 times itself. And 1 has factors 1x1.
No idea.
Some Vunt
Banned
That's not SC. Lol
I don't get why they would make a school certificate exam if they are going to be testing you on year 8 work?
bleakarcher
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x^2+(4/3)x+1=0
x^2+(4/3)x=-1
(x+2/3)^2=-1+4/9=-5/9
Hence, there is no solution to the equation
bleakarcher
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lol, no one cares
bleakarcher
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no actually, that would have stunned many people with less exposure to these questions as some dont trust their ability in algebra
Aw you beat me by one! Grr. I stuffed up two multiple choices cos I was stupid and misread them, and then I got the prime number question wrong and in question where you had to draw a square pyramid I forgot to indicate that the base was actually a square and I didn't draw on any right angles or the dashes to show that the sides were all equal.. haha97, read a question wrong and lost 3 marks
@1 not being a prime
They don't consider 1 to be a prime anymore because it means that there are infinite prime products of any non-prime integer.
For example: 10 can be written as 5 times 2, so it has 1 product of just primes. But if 1 were a prime, then we could say 5 times 2, 5 times 2 times 1, 5 times 2 times 1 times 1, and so on, meaning it would be infinite.
Well yeah and then so 1 only has 1 factor, like 1 and itself would be 1 and 1, so then it doesnt really have two factors? if that makes sense.. kinda makes sense in my head lol.
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Queenroot
I complete the Squar3
um, get 85%+ correct ?
are you that dense ?
bleakarcher
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The equation of a circle centre (-3,-1) and radius 9.