Q&A - PSLE Math

[tianzhu]

YumYum:

Hi, can anyone pls help with this Qn?


Alicia gave some beads to Betty such that Betty had 40% of the beads that Alicia had. After that, Alicia gave another 170 beads to Betty. In the end, Betty had 80% of the number of beads that Alicia had. How many beads did Betty have in the end?

thanks.

Hi

The total number of beads remained the same.

At first
Alicia: Betty ------- 5:2 (7) --------45:18 (63)

In the end
Alicia: Betty ------- 5:4 (9) --------35:28 (63)

10 units ------ 170

1 unit ------ 17

Betty ------ 28*17 -------476

Best wishes

[YumYum]

Hi Tianzhu,


thank you for the usual prompt help!

[tianzhu]

YumYum:

Hi Tianzhu,


thank you for the usual prompt help!

Hi

You're welcome.

Best wishes

[tianzhu]

parents222:

Hi tianzhu, now I understand and it seems simple too! Thank you very much for your time!!

Hi

You're welcome.

Best wishes

[parents222]

Hi tianzhu, thanks alot for the solution!

[tianzhu]

jewelbox:

Appreciate any help to solve this qn in PSLE bk qn11.

A B C D
1 2 3 4
8 7 6 5
9 10 11 12
16 15 14 13
In which column will the number 432 appear?

Hi

Good Morning.

Try to establish a pattern.

Hope this help.

Best wishes

http://farm8.staticflickr.com/7257/7126347141_369d94bb9d_z.jpg\">

[tianzhu]

parents222:

Hi tianzhu, thanks alot for the solution!

Hi

Good Morning.

You're welcome.

Best wishes

[MathIzzzFun]

small:

Many thanks again MathIzzzFun..


I realised my mistake, thought they were started from different towns.

avec plaisir

cheers.

[Denise]

Denzel, Eugene and Farhan bought a packet of marbles. Denzel received 145 marbles.Farhan received 30% less marbles than Eugene. Later,Denzel gave 68 marbles to Eugene and Farhan to share. After that, Farhan still had 30% fewer marbles than Eugene. The number of marbles Eugene had increased by 25%. How many marbles were there in the packet at first?

[tianzhu]

Denise:

Denzel, Eugene and Farhan bought a packet of marbles. Denzel received 145 marbles.Farhan received 30% less marbles than Eugene. Later,Denzel gave 68 marbles to Eugene and Farhan to share. After that, Farhan still had 30% fewer marbles than Eugene. The number of marbles Eugene had increased by 25%. How many marbles were there in the packet at first?

Hi

You may use MD or work with units.

To avoid working with decimals, use equivalent ratios.

Denzel received 145 marbles

Eugene ------- 40 units
Farhan ------- 28 units

Denzel gave 68 marbles to Eugene and Farhan to share.

Eugene ------- 50 units
Farhan ------- 35 units.

(35+50) – (40+28) ------- 17

17 units ------- 68
1 unit ------- 4

68 units ------- 272

272+145 ------ 417

Best wishes