Q&A - PSLE Math

[tianzhu]

Shimmer:

Hi all


One more question.

Ravi put some eggs into 3 boxes box A, box B and box C. 1/2 of the eggs in box A is equal to 3/10 of the eggs in box B . The numbers of egg in box C is 16 more than 1/2 of the total numbers of eggs in box A and box B, if 25% of the eggs in box C were broken and removed, there were 804 more eggs in box B than in box C. Ravi sold each egg at 8 cents. How much did he earn ?

Hi

Box A ----- 6 units

Box B ------ 10 units

Box C ----- 8 units + 16

25% of the eggs in box C were broken and removed.

Box C (removed) ----- 2 units + 4

Box C (left) ----- 6 units + 12

There were 804 more eggs in box B than in box C.

10 units – (6 units + 12) ------ 804

1 unit ----- 204

Number of eggs sold ------ 22 units + 12 ------ 4500

Ravi sold each egg at 8 cents

4500*8 ------ $360.

Best wishes

[Shimmer]

Thanks !

[nounou]

:thankyou: :lovesite:

tianzhu:

Hi Treelodge

Just curious, are you a parent or PSLE student?

You seem to be asking questions based on questions posted earlier by others.

In questions on Speed, it’s really helps to start with a simple diagram.

They met each other after the car had travelled 3/4 of the journey.

Divide the distance line into 4 parts.

The car travelled 6 units and the van travelled 5 units during the same period.

Hence, 1 part ------ 6 units

4 parts ------ 24 units

This gives 13 units (24-6-5) -------195

Best wishes

[nounou]

:thankyou: :thankyou: :thankyou:

tianzhu:

Hi Treelodge

Just curious, are you a parent or PSLE student?

You seem to be asking questions based on questions posted earlier by others.

In questions on Speed, it’s really helps to start with a simple diagram.

They met each other after the car had travelled 3/4 of the journey.

Divide the distance line into 4 parts.

The car travelled 6 units and the van travelled 5 units during the same period.

Hence, 1 part ------ 6 units

4 parts ------ 24 units

This gives 13 units (24-6-5) -------195

Best wishes

[tianzhu]

Michaelia0816:

Thx, but my teacher said that she found it in psle prelim papers in recent years!!

Hi girl

For examination purpose, I think it is good enough to get familiar with common grids.

2*2 ------- 6 ways

2*3 ----- 10 ways

2*4 ----- 15 ways

2*5 ------ 21 ways

3*3 ------- 20 ways.

Best wishes

[jewelbox]

Hi, I need help with the 2 qns. thks. http://i50.tinypic.com/2yzbtdv.jpg\">

[jewelbox]

http://i49.tinypic.com/2upsco9.jpg\"> thanks.

[jewelbox]

Why only ans 3 cannot tessellate and the rest can? thanks. http://i45.tinypic.com/21919vr.jpg\">

[tianzhu]

jewelbox:

Hi, I need help with the 2 qns. thks. http://i50.tinypic.com/2yzbtdv.jpg\">

Hi

This question has been discussed before.

Hope this helps.

Best wishes

http://farm8.staticflickr.com/7214/7247260632_c743438cda_z.jpg\">

[tianzhu]

jewelbox:

http://i49.tinypic.com/2upsco9.jpg\"> thanks.

Hi

This question has been discussed before.

I believe students are comfortable with working out the area of square when its diagonal is known.

I’ll leave it to students to work out the calculations in details.

Hope this helps.

Best wishes

http://farm7.staticflickr.com/6072/6132998444_f31d12aa64_z.jpg\">