Muku:

English LC Q20 my DD also answered 3.


What is Q19 ans? Why was she confused? Is answer 2: she has looked for the book so hard and now she's not sure whether to read???

My answer was 3, I think. It was the one about she could not understand why the Child said \"To live forever is to not live at all\". Not so sure though...

chokos:

Q3) Three sisters Lisa, Ming and Nora shared the cost of a present for their father. Lisa paid ¼ of the total share of Ming and Nora. Ming paid 1/9 of the total share of Lisa and Nora. Nora paid $60 more than Ming. How much did the present cost? Model Answer: $100

1st ratio:
L: 1u x2 = 2u
M+N: 4u x2= 8u
Total: 5u x2= 10u

2nd ratio:
M: 1u
L+N: 9u
Total: 10u


Since the price of the present will not change, the total of both ratio should be the same. Thus, we x2 the total of the 1st ratio to make the total of both ratios to be the same. And since we x2 the total, we need to x2 everything else in the 1st ratio.

No. of units for Nora--9u(L+N) - 2u(L) = 7u(N)
Diff between Nora and Ming--7u-1u=6u
6u--$60
1u--$60/6=$10
10u--$10 X 10= $100

Ans: $100

chokos:

Q 2) Mrs Lee spent ½ of her money on some almond cookies and 2/5 of the remaining money on 6 slices of butter cake. Each slice of butter cake costs thrice as much as one almond cookie. How many almond cookies did she buy? Model Answer: 18 almond cookies.

Actually, I've got 45 for this question. Not too sure if I am correct. Here's my working:

Spent on butter cake--2/5 X 1/2(remainder) = 1/5 of total
1/5 of total worth of almond cookies--6 X 3 = 18

However, 1/2 was spent on almond cookies, not 1/5.

1/2=5/10 of total
1/5=2/10 of total

2/10--18 cookies
1/10--18/2=9 cookies
5/10--9 X 5= 45 cookies

My answer: 45 cookies

chokos:

Hi all,

Thanks for helping.
I need help to solve the following questions:

Q 1) Some pupils from 5K, 5L and 5M took part in a Social Studies quiz. 34 participants were from 5L and 5M. 21 participants were not from 5L and 19 participants were not from 5M. How many pupils from these 3 classes took part in the quiz? Model Answer: 37pupils

5L + 5M: 34

21 not from 5L means that the 21 are from 5K + 5M

19 not from 5M means that the 19 are from 5K + 5L

Notice that if you add all the numbers up, you will get 2 5K, 2 5L and 2 5M.

So:

2 5K, 2 5L, 2 5M--34+21+19=74
No. of pupils from all 3 classes (1 5K, 1 5L, 1 5M)--74/2=37

Ans: 37 pupils

Hope this helps ^_^

2. 12 days–read 1/5 of book

10 days–1/5/12x10=1/5x1/12x10=1/6 of book
22 days–1/6+1/5=11/30 of book
19/30 of book not read–570
1/30 of book–570/19=30
30/30 of book–30x30=900

Ans:900 pages

Hope this helps! ^_^

Hi,


1.
Now:
S : M Diff
1u : 4u 3u

5 yrs time:
S : M Diff
1u 3u 2u

The concept here is constant difference since the age difference between Samuel and Meihui will always be the same. So, we make the difference the same for both ratios, whether it is now or 5 yrs later.

Now:
S : M Diff
2u : 8u 6u

5 yrs time:
S : M Diff
3u : 9u 6u

The difference between the no. of units of now and 5 yrs time is 1u. Thus, 1u–5 yrs
Meihui now has 8units. So, 8x5yrs=40yrs
Meihui is now 40yrs old.