不是自己心仪的GEP学校还要去上吗?

wd369 · 发表于 4-12-2011 15:12:21|来自：新加坡

本帖最后由 wd369 于 8-12-2011 15:22 编辑

有2道 GEP P4 SA2的数学考题(来源: http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=25121 ), 大家看看难度如何

1. In a group of children, the mean age of the children is 10 years. If the mean age of the 8 boys was 15 years, the mean age of the girls was 6 years. How many children were there altogether?

2. 44 boys and 47 girls want to school camp. The pupils were put into groups. There was an equal no. Of pupils in each group. The number of groups is larger than the number of pupils in each group.
A) how many groups were there?

In each group, the no of boys was 1 more or1 less than the no of girls,
B) how many groups had more girls than boys?

vivocity2010 · 发表于 5-12-2011 09:06:51|来自：新加坡

去不去在你自己的考虑！
但不去是损失是肯定的！

乐陶陶 · 发表于 5-12-2011 22:55:50|来自：新加坡

这个问题，在gep没发通知的时候我就提醒过大家，看好自己的名次，不要失去择校的主动权

lz你的短信我回了，目前你的这种情况比较被动，所以我给你提的方法也比较特别，你看看想想吧，其实为了孩子可以试下

乐陶陶 · 发表于 5-12-2011 23:11:52|来自：新加坡

忽然想起来，在提醒lz一句，去moe不要怕这怕那，记住一点，你的孩子是gep得主，他们moe得捧着你，有什么要求强硬的直接提出，只要不偏题，他们都会满足你的。

yishun2009 · 发表于 8-12-2011 14:27:30|来自：新加坡

wd369 发表于 4-12-2011 15:12
有2道 GEP P4 SA2的数学考题(来源: http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=25121 ...

1。18 pupils
2-1。7 groups
2-2。5 groups

对不对？

wd369 · 发表于 8-12-2011 15:26:27|来自：新加坡

本帖最后由 wd369 于 8-12-2011 15:28 编辑

yishun2009 发表于 8-12-2011 14:27
1。18 pupils
2-1。7 groups
2-2。5 groups

你解答得正确. 只是看了K论坛上解法,应该第2道贴出来的试题内容不全,导致2种答案. 所以加了一句(The number of groups is larger than the number of pupils in each group. )限制一下.

MathIzzzFun:

some information is missing.. for eg. For A) it can be either 7 groups of 13 children or 13 groups of 7 children

B) For 13 groups with 7 children each, each group will have either 4 boys/3 girls or 3 boys/4 girls

44 boys --> 44/13 = 3R5. So, there are 5 groups with 4 boys/3 girls and 8 groups with 3 boys/4 girls ie 8 groups with more girls.

For 7 groups with 13 children each, each group will have either 7 boys/6 girls or 6 boys/7 girls.

44 boys --> 44/7 = 6R2. So, there are 2 groups with 7 boys/6 girls and 5 groups with 6 boys/7 girls ie 5 groups with more girls.

cheers.

Last edited by MathIzzzFun on Wed Oct 12, 2011 10:15 pm, edited 3 times in total.