2012 GCE O Level Mathematics Paper 2 Suggested Solutions

zzz07 · 发表于 25-10-2012 08:49:09|来自：广东深圳

我现在卷二96upon100，卷一74upon80。听说去年A1是大于96／100，今天估计怎样？

_H0ney_ · 发表于 25-10-2012 10:48:34|来自：广东深圳

zzz07 发表于 25-10-2012 08:49
我现在卷二96upon100，卷一74upon80。听说去年A1是大于96／100，今天估计怎样？

去年93、今年估计差不多，大部分的人做的都不错。但也是有人说british那边很久才上一次80多的A1，所以新加坡也不会总是把A1放的这么高，所以90以上可以稍微放心~不过这都是传闻啦，具体还是要看bell curve~

jsnleong · 发表于 25-10-2012 10:53:21|来自：广东深圳

老师，

last qn probability of neither of them is a right handed female.

Isn't it = 1 - (5/16 x 4/15) ?

zzz07 · 发表于 25-10-2012 11:47:17|来自：广东深圳

jsnleong 发表于 25-10-2012 10:53
老师，

last qn probability of neither of them is a right handed female.

It's 11/16 times 10/15

3+6+2=11
3+6+2-1=10

zzz07 · 发表于 25-10-2012 11:50:27|来自：广东深圳

本帖最后由 zzz07 于 25-10-2012 11:53 编辑

_H0ney_ 发表于 25-10-2012 10:48
去年93、今年估计差不多，大部分的人做的都不错。但也是有人说british那边很久才上一次80多的A1，所以新 ...

British是normal mode. Singapore是hard mode。。。你是青岛人啊？我也是，青岛市内市南区的！

jsnleong · 发表于 25-10-2012 11:54:23|来自：广东深圳

本帖最后由 jsnleong 于 25-10-2012 12:04 编辑

Ouch. I think i got 76/80 for p1 and 91/100 for p2. Overall should be 93/100.

老师，

if qn 2d) i did not get the correct ans, i think i got 12.9cm or something. So the entire 3m gone? Or would there me method mark for doing cosine rule (i did not do cosine rule for triangle ADE, i did it for triangle beside it)

10ai) I put median as 37.5?

10b)ii)b) probability qn about neither right handed female, i would get 0 straight away? Would there be 1m?

Many careless mistakes. I think this yr olvl harder than last yr, right? So i think 90 above A1~