Q&A - PSLE Math

[pixiedust]

Appreciate help with this :


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(a) Find the area of shaded parts [3 marks]

[Winx5015]

Thanks tianzhu

[Winx5015]

Following are some math prelim 2011 (paper 2) questions, can anyone help?


1). 1 notebook and 1 wallet cost $8.30.
2 wallets and 2 pens cost $18.
3 pens and 3 notebooks cost $16.50.
Find the total cost of 3 notebooks, 4 wallets and pens.

2). Four sisters Anne, Betty, Chels and Dorothy shared the cost of a travel package to Switzerland. The contribution made by Anne is 1/2 that of the total contribution made by the other three sisters. Contribution made by Betty is 1/4 of the total contribution made by the other three sisters and the contribution made by Chels is 2/3 of the total contribution made by the other three sisters. If the total price of the package is $9900, find the contribution made by Dorothy.

3). Tank A is 1/2 filled with water. Tank B, which has twice the capacity of Tank A, is 1/3 filled with water. When water in Tank B is poured into Tank A until Tank A is completely filled with water to the brim, Tank B contained some water.
a). What fraction of Tank B's capacity is the fraction of the remaining water in Tank B?
b). Given that the length and breadth of Tank B are 34cm by 15cm respectively, what is the height of Tank B if the remaining volume of water in Tank B is 3.4 litres?

4). At a jewellery shop, 40% of the items are brooches. The remainder are rings and bangles. For every bangle, there are 4 rings.
a). Find the ratiio of brooches to bangles to rings. (Give your answer in simplest form)
b). There are 48 more rings than brooches. After some brooches were sold and none of the rings and bangles were sold, 20% of the remaining items at the jewellery shop are brooches. How many brooches were left?

Thanks for helping

[Shimmer]

Dear Tianzhu


Need helP !Urgent
May had 60% more cards than Ail. Hay had 35% fewer than May. May and Ail gave Hay in a ratio of 3:1. Hay had a 1 1/2 times as many cards as before. Given that May had 238 more card than Ali in the end,how many cards did May give to Hay?

[Shimmer]

Shimmer:

Dear Tianzhu


Need helP !Urgent
May had 60% more cards than Ail. Hay had 35% fewer than May. May and Ail gave Hay in a ratio of 3:1. Hay had a 1 1/2 times as many cards as before. Given that May had 238 more card than Ali in the end,how many cards did May give to Hay?

Hi Tianzhu

I got the answer already so don't need to post.

Thanks

[2632parent]

Need help on this simply question


1) 75% of the girl and 25% of the boys in a class of 36 pupils wear glasses. 21 pupils in the class do not wear glasses. How many girl in the class wear glasses?

Thank you

[Shimmer]

Please help need urgent


Luna had 50% more marbles than Rome. When Luna and Rome each gave 14% of their marbles to Sira, the no. of marbles Sira had increase to 70%. In the end, Luna had 88 more than Sira. How marbles Rome had at first ?

[PiggyLalala]

jarenchuatw:

Help, pls...


At a prefect investiture, prefects could bring either one or both their parents along. If the ratio of the number of prefects to the number of parents who attended was 7:9 and 1/7 of the prefects brought only 1 parent, what fraction of the prefects did not bring any parents along?

My answer is 2/7

[PiggyLalala]

Winx5015:

Following are some math prelim 2011 (paper 2) questions, can anyone help?


1). 1 notebook and 1 wallet cost $8.30.
2 wallets and 2 pens cost $18.
3 pens and 3 notebooks cost $16.50.
Find the total cost of 3 notebooks, 4 wallets and pens.

2). Four sisters Anne, Betty, Chels and Dorothy shared the cost of a travel package to Switzerland. The contribution made by Anne is 1/2 that of the total contribution made by the other three sisters. Contribution made by Betty is 1/4 of the total contribution made by the other three sisters and the contribution made by Chels is 2/3 of the total contribution made by the other three sisters. If the total price of the package is $9900, find the contribution made by Dorothy.

3). Tank A is 1/2 filled with water. Tank B, which has twice the capacity of Tank A, is 1/3 filled with water. When water in Tank B is poured into Tank A until Tank A is completely filled with water to the brim, Tank B contained some water.
a). What fraction of Tank B's capacity is the fraction of the remaining water in Tank B?
b). Given that the length and breadth of Tank B are 34cm by 15cm respectively, what is the height of Tank B if the remaining volume of water in Tank B is 3.4 litres?

4). At a jewellery shop, 40% of the items are brooches. The remainder are rings and bangles. For every bangle, there are 4 rings.
a). Find the ratiio of brooches to bangles to rings. (Give your answer in simplest form)
b). There are 48 more rings than brooches. After some brooches were sold and none of the rings and bangles were sold, 20% of the remaining items at the jewellery shop are brooches. How many brooches were left?

Thanks for helping

Is the answer for Q2: $660

[Neat]

Hi!


I need help!

Please assist on the following question:

Four girls each has some money. Kyna has 1/3 of the total amount of money that Lynn, Gigi and Tin Wing have. Lynn has 1/4 of the total amount of money that Kyna, Gigi and Tin Wing have. Gigi has 1/5 of the total amount of money Kyna, Lynn and Tin Wing have. If Tin Wing has $368, how much money do the four girls have altogether?

Thanks