cs is computer science ah? what school you in? so cool
Originally posted by Music-Life:I couldn't figure out the sequence question, and I fell for the trick in question 2. Question said that he sold the watch at 135% profit from cost, I didn't think and put the selling price as 135% of the cost.
There have been disputes for that question. How did all of you guys answer it?
An inverted triangle shaped prism takes 8 seconds to fill completely, and is 24 cm in height. How long does it take to fill 12 cm? Also, draw a graph.
_______ _
\ | ^
\ | |
\ | 24
\ | |
\ | |
\ | |
\ | v
Ratio of height = 12: 24 = 1:2
Ratio of volume = (1:2)^3 = 1:8
8 parts = 8mins
1 part = 1min
i think i did fairly well for this paper despite failing my prelim
so that means 4min for half ? no right?~.~
Originally posted by Mikethm:Ratio of height = 12: 24 = 1:2
Ratio of volume = (1:2)^3 = 1:8
8 parts = 8mins
1 part = 1min
hmmm i think u got it wrong
Originally posted by ViewtyKU990:hmmm i think u got it wrong
same... because the thing cross section isnt like constant throughout.. like box, its like bottom small small top big big, like cone.
My take on the Maths Paper 1:
Well, it was quite smooth sailing. The question of the triangular tank. My answer was 2 mins and the graph sketching is of a decreasing gradient.
The other question that sort of tricks some people is the vector question. The statement of P, Q and O was that all three lay on same line and that one point is the mid point of the line PO.
I hope that tomorrow's paper will be as smooth sailing as the Paper 1. Good luck guys! I am thinking that construction, graph sketching and bearings will come out. Oh yeah, not forgetting conversion of formula.
Originally posted by yiha093:same... because the thing cross section isnt like constant throughout.. like box, its like bottom small small top big big, like cone.
I didn't see the actual question but based the solution on the diagram provided by the ealier poster. So assuming that he gave the correct info and the object is a CONE.
The part which is to be filled is a cone with height 12cm
The whole object is a cone with height 24cm
Therefore the 2 object(s) are similar cones.
Thus the question is testing your knowledge of similarity.
Are you guys talking bout PSLE?
Originally posted by Msportiaser:Are you guys talking bout PSLE?
nope about o level lols. psle is long gone
for the geometry qn, wat were the 2 possible coordinates for D? I wrote (6,0) and (6,-4).
I also heard (6,6) from my friends.
Oh hahas, I saw someone mentioning bout PSLE and I was thinking that isn't it over already? Had had it read again, understood. Sorry bout that :P
cs is computer studies and i think it isn't fun at all!
My views
Shocker heaven : Paper was slightly easier than expected, constructions missing and some questions are unconventional
But i think i still have chance for A1\
Anyway, my t=1, graph decreasing
And the population question, i leave in 3 sf as there is no reason to round down for a average question, it is not like A maths how many minutes, hours etc, these you NEED to round up or down, but this is just a plain average question, a 3sf accuracy should be ok
For the money qns, i placed in 3 sf, dunnoe correct or not, need to put in 2dp???
In addition, they can deduct unlimited marks for SF, take note, dun think there is a cap, there isn't
Originally posted by SBS n SMRT:My views
Shocker heaven : Paper was slightly easier than expected, constructions missing and some questions are unconventional
But i think i still have chance for A1\
Anyway, my t=1, graph decreasing
And the population question, i leave in 3 sf as there is no reason to round down for a average question, it is not like A maths how many minutes, hours etc, these you NEED to round up or down, but this is just a plain average question, a 3sf accuracy should be ok
For the money qns, i placed in 3 sf, dunnoe correct or not, need to put in 2dp???
In addition, they can deduct unlimited marks for SF, take note, dun think there is a cap, there isn't
money should be in 2 dec pl or nearest cents <--- both the same
and there is a cap of 3 marks if i am not wrong.
Originally posted by ViewtyKU990:money should be in 2 dec pl or nearest cents <--- both the same
and there is a cap of 3 marks if i am not wrong.
shit..-2marks liao.....: :-(
Originally posted by ViewtyKU990:money should be in 2 dec pl or nearest cents <--- both the same
and there is a cap of 3 marks if i am not wrong.
really meh.I thought money still leave in 3s.f....=/
money leave to 2 d.p.
you can write as $102.30 (correct to nearest cent)
and t=2. definitely not 4.
the cumulative graph was misleading. especially for the upperquartile.
Originally posted by SBS n SMRT:My views
Shocker heaven : Paper was slightly easier than expected, constructions missing and some questions are unconventional
But i think i still have chance for A1\
Anyway, my t=1, graph decreasing
And the population question, i leave in 3 sf as there is no reason to round down for a average question, it is not like A maths how many minutes, hours etc, these you NEED to round up or down, but this is just a plain average question, a 3sf accuracy should be ok
For the money qns, i placed in 3 sf, dunnoe correct or not, need to put in 2dp???
In addition, they can deduct unlimited marks for SF, take note, dun think there is a cap, there isn't
sweet.
i didn't round up for the avg.
cause SS hit me. i was wondering, singapore wanted 2.1 average birth rate.
so i just did what common sense told me and didn't round up. put 3sf.
Originally posted by forum-er93:the cumulative graph was misleading. especially for the upperquartile.
the upper quartile is 55 isnt it?
Originally posted by Daisuke-kun:sweet.
i didn't round up for the avg.
cause SS hit me. i was wondering, singapore wanted 2.1 average birth rate.
so i just did what common sense told me and didn't round up. put 3sf.
LOL! its over anyway, good luck for todays paper
Originally posted by ViewtyKU990:the upper quartile is 55 isnt it?
i think is 66 leh?????? how the hell u get 55?
Originally posted by Daisuke-kun:sweet.
i didn't round up for the avg.
cause SS hit me. i was wondering, singapore wanted 2.1 average birth rate.
so i just did what common sense told me and didn't round up. put 3sf.
spot on, same instinct as me....
i dun noe u sec 4 until now, at hideout u never reveal anything leh
Originally posted by SBS n SMRT:spot on, same instinct as me....
i dun noe u sec 4 until now, at hideout u never reveal anything leh
For me,I think human can split into parts meh...So i round up lor haha