Q&A - PSLE Math

[MummyJamie]

small:

MummyJamie:

Sally baked some cookies to sell. ¾ of them were chocolate cookies and the remaning were almond cookies. After she sold 5/6 of the chocolate cookies and 210 almond cookies, she had 1/5 of the cookies left. How many cookies did she sell?


That one was 960 right?

Most of us got that.

Plese share your working,thanks.

Chocolate Cookies : Almond Cookies
3 : 1
= 30 : 10

30units / 6 = 5units ( left )

Left:

Chocolate Cookies : Almond Cookies
30 : 10
5 : 3

30u + 10u = 40u
40u / 5 = 8u ( cookies left )
8u - 5u ( chocolates left ) = 3u ( almonds left )
10u - 3u = 7u ( Almonds sold )

7u -> 210
1u -> 30
25u + 7u = 32u
32 x 30 = 960cookies

[MummyJamie]

nani:

Same here!!! 100 right??? 25x4=100 rite... i think so...

I drew a diagram.

[nothing2do]

nani:

MummyJamie:

Ohh! And for paper one, the second last question, the computer one, what did ya'll get?


I got 100 minutes. Many are saying it's 25.

o_o

Same here!!! 100 right??? 25x4=100 rite... i think so...

same here 100

[nothing2do]

MummyJamie:

I'm Jamie, child of my mum's account XD


PSLE Maths was tough for me. I was able to answer all the questions, though. For the angles/geometry one, most of my classmates got 120, 135 or 150. I used guess & check at first, but then used ratio and got 120. Anyone used ratio & got that too?

mine daughter also use ratio and get 120

[nani]

Anybody remembers the curry puff qn? :?

[CrazyDad]

Hey Folks, it is time to revise the Chinese. So go home…

[millan]

I remmember Q7. Curry puff shop sells puffs at $0.80.O50ffer:Buy 3 get 4th half price.If customer got $50, how many puffs can he buy if he buys as many as he can.


Ans: $2.40 ($0.80x3) + ($0.40) = $2.80
$50/$2.80=17R$2.40
$2.40/$0.80 = 3
17x3+3 = 54

Ans:54

[millan]

I need be reading help xia. (To all who maybe reading, I'm her son)

Q17 is tough. I put 120 degrees but top girl put 135 degrees. I not sure which is which - We've got about 8 Ans. If got ans or method pls post ASAP. supense is killing me. :stupid: :stupid: :stupid: :stupid: :stupid:

[Vanilla Cake]

millan:

I remmember Q7. Curry puff shop sells puffs at $0.80.O50ffer:Buy 3 get 4th half price.If customer got $50, how many puffs can he buy if he buys as many as he can.


Ans: $2.40 ($0.80x3) + ($0.40) = $2.80
$50/$2.80=17R$2.40
$2.40/$0.80 = 3
17x3+3 = 54

Ans:54

Hi millan,
1 'set' = 3x0.80+0.40 = $2.80
50/2.80 = 17 R 2.40
$2.40 = 240 cents
240 cents/80 cents = 3
17 x 4 + 3 = 71 as 1 set got 4 curry puffs (3 at $0.80 and 1 at $0.40).
With $50, he can buy as many as 71 curry puffs

[millan]

Vanilla Cake:

millan:

I remmember Q7. Curry puff shop sells puffs at $0.80.O50ffer:Buy 3 get 4th half price.If customer got $50, how many puffs can he buy if he buys as many as he can.


Ans: $2.40 ($0.80x3) + ($0.40) = $2.80
$50/$2.80=17R$2.40
$2.40/$0.80 = 3
17x3+3 = 54

Ans:54

Hi millan,
1 'set' = 3x0.80+0.40 = $2.80
50/2.80 = 17 R 2.40
$2.40 = 240 cents
240 cents/80 cents = 3
17 x 4 + 3 = 71 as 1 set got 4 curry puffs (3 at $0.80 and 1 at $0.40).
With $50, he can buy as many as 71 curry puffs

Yes. the father said is 71