Q&A - PSLE Math

[kuts]

HI Ksme,


A B C D A A B B C C D D A A A B B B C C C D D D .....................? 160th
What is the 160th letter

Thanks in advance!

kuts:

ksme:

[quote=\"kuts\"]Can anyone help me to solve the qn no. 29 of Tao Nan 2012 Prelims.
Thanks ksme. I could understand now from ur explanation

Thanks in advance

Hi,
Is this the ribbon question? If yes, here's the solution:

Vertical sides = 4*22cm = 88cm
top and bottom sides =2*(15+20)=70cm
Ribbon used to tie the bow = 200-88-70=42cm
Answer = 0.42m

[/quote]

[tianzhu]

dicoyote:

3) Terence was driving from King's Gardens to Queen's Park. Halfway to his destination, his car passed Sally's car which is travelling at 84km/h in the opposite direction. 1 1/3h later, Terence reached Queen's Park while Sally was still 10km away from King's Gardens.
(a) What was the distance between King's Gardens and Queen's Park?
(b) What was the average speed that Terence was travelling?

Hi

For Speed questions, it’s useful to have a simple diagram.

In 1 1/3h, Sally covered 84*4/3 ------112km

Distance to midpoint -------- 112 + 10 ------ 122km

Distance between King's Gardens and Queen's Park ------ 122*2 ------- 244 km

Average speed of Terence ------- 122/4/3 ------ 91.5 km/h

Best wishes

[nounou]

http://i48.tinypic.com/11t9wz6.jpg\"> Very pai seh! :imsorry: Another Q from Nanyang Prelim 2012. Q15. :gloomy: Someone please tell (lie to) me actual PSLE Maths is not that difficult.

How to do bi and bii? Answers given bi=21, 22, 51,52 bii=72
:thankyou: :thankyou: :thankyou: [img]

[nounou]

http://i50.tinypic.com/54yk9l.jpg\"> Some please help! :?: Need to double confirm answer to this Q.

Nanyang Prelim 2012 Q2.
:thankyou: :thankyou: :thankyou:

[nounou]

http://i46.tinypic.com/idhth5.jpg\">

:?: Please help! :imdrowning:
Nanyang Prelim 2012 Q18 :slapshead:
Answer given = 96
:thankyou: :thankyou: :thankyou:

[tianzhu]

Treelodge:

http://i46.tinypic.com/idhth5.jpg\">

:?: Please help! :imdrowning:
Nanyang Prelim 2012 Q18 :slapshead:
Answer given = 96
:thankyou: :thankyou: :thankyou:

Hi

I think you can use MD, but I’ll use letters of the alphabet so as to save some time.

Number of representatives in B ------- 1 box
Number of representatives in A ------- 1 box + 18
Number of representatives in C ------- 1 box + 18 + 6

School A
Boys: Girls------- 1A:3A

School B
Boys: Girls ------- 1B:5B

School C
Boys: Girls ------- 2C:5C

1A + 1B + 2C ------ 1p
3A + 5B + 2C ------3p

3A + 3B +6C ------- 3p

3A + 3B +6C ------- 3A + 5B + 2C

Hence, you’ll get 1C ------- 2B

Now change (2C + 5C) to 14B and do a comparison.

14B – 6B (1B+5B) ------- 24

8B ------- 24

B ------- 3

C ------- 6

Number of representatives in C ------- 7*6 ------ 42

Number of representatives in A ------- 42 - 6 ------ 36

Number of representatives in C ------- 18

Total number ------- 96

Best wishes

[tianzhu]

Treelodge:

Treelodge:

Please help to solve this Q :yikes: :?:

Q10 from Nanyang Prelim 2012. :gloomy:
Answer given = 266 2/3 m
:thankyou: :thankyou: :thankyou: [IMG]http://i49.tinypic.com/30nfdja.jpg\">

http://i49.tinypic.com/30nfdja.jpg\">

Hi

I did a quick check and get an answer of 266 and 2/3 (266.67)

I don't have time to prepare slide now, is the answer same at the ws?

Best wishes

[tianzhu]

Treelodge:

http://i50.tinypic.com/54yk9l.jpg\"> Some please help! :?: Need to double confirm answer to this Q.

Nanyang Prelim 2012 Q2.
:thankyou: :thankyou: :thankyou:

Hi

You would like to double confirm he answer.

My answer is 150.

Please share the answer given in the WS ?

Best wishes

[tianzhu]

Treelodge:

http://i48.tinypic.com/11t9wz6.jpg\"> Very pai seh! :imsorry: Another Q from Nanyang Prelim 2012. Q15. :gloomy: Someone please tell (lie to) me actual PSLE Maths is not that difficult.

How to do bi and bii? Answers given bi=21, 22, 51,52 bii=72
:thankyou: :thankyou: :thankyou: [img]

Hi

Could we have a clearer image, please?

Best wishes

[MathIzzzFun]

Treelodge:

http://i50.tinypic.com/54yk9l.jpg\"> Some please help! :?: Need to double confirm answer to this Q.

Nanyang Prelim 2012 Q2.
:thankyou: :thankyou: :thankyou:

area of shaded regions = 1/2 area of square = 1/2 x 10 x 10 = 50 cm²

ratio of shaded : unshaded --> 1: 3 = 50 : 150
Unshaded area --> 150 cm²

cheers.