SG
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Primary 6
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Number and Algebra
Kindly please help. Thanks in advance.
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5
Xavier Sng
The total number of chocolates needed to increase each bag by one chocolate is 30 + 50 = 80
That means there are 80 bags.
Either 3×80 + 30 = 270
Or 4×80 - 50 = 270
6 years ago
Voon Jasmine
Thank you Xavier Sng :)
6 years ago
Xavier Sng
Please don't mention it. Regards
6 years ago
Voon Jasmine
I got 80 initially n can't think the next step. Thanks again for helping me. :)
6 years ago
Xavier Sng
You are too formal. We are here to help and share. I am glad you are able to understand how to proceed from there. Keep it up!
6 years ago
Irene Kong
Asked 9 years ago
SG
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Pls help.
Replies
3
Xavier Sng
Total number of fish initially
= 288 × 100%/60%
= 480
Total fish unsold
= 480 × 35%
= 168
Angelfish---♡♡♡
Guppies-----♡
Since 4 units --> 168
2 units --> 84 more angelfish than guppies in the end
6 years ago
Irene Kong
Thanks:)
6 years ago
Xavier Sng
Glad to help. Regards
6 years ago
Serene Koon
Asked 9 years ago
SG
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Primary 6
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Number and Algebra
Pls help P6 math. TIA
Replies
33
Xavier Sng
The greatest number of women in the queue is 18. I will draw a diagram and post it in a minute.
6 years ago
Serene Koon
Thanks Xavier Sng. Appreciate
6 years ago
Xavier Sng
6 years ago
Xavier Sng
My pleasure, Serene. Regards
6 years ago
Boey Wai Yen
Erm...but, Xavier Sng, there are supposed to be at least 4 men between 2 women, so the partial group cannot be in WMMMW configuration, can it?
6 years ago
Xavier Sng
why not? There are no more women behind those last three men.
6 years ago
Xavier Sng
WWMMMM for eight groups, and last 5 people WWMMM
6 years ago
Boey Wai Yen
I was thinking needed to be WMMMMW.
So last full group of 6 people would have been WMMMMW, ending with a W, so remaining 5 would have been MMMMW.
Pls excuse my doubts, trying to clarify for my knowledge. I'm puzzled, coz I'm not very good at such questions.
6 years ago
Xavier Sng
That arrangement would only yield 17 women. WMMMMW for eight groups and last partial group WMMMM
6 years ago
Xavier Sng
Arh okay, I see what you mean now. I interpreted "4 men between any 2 women" where two women are considered as one entity.
6 years ago
Xavier Sng
What you interpreted is that there are 4 men on either side of each woman.
6 years ago
Boey Wai Yen
Ah! Lightbulb goes off.💡
So er....either interpretation could work?
6 years ago
Xavier Sng
You know what, I would suspect that the setter's original idea is your interpretation lol
6 years ago
Serene Koon
according to answer sheet, answer given 11 women
6 years ago
Boey Wai Yen
6 years ago
Xavier Sng
I stand corrected, Wai Yen, thanks for pointing that out.
6 years ago
Xavier Sng
6 years ago
Xavier Sng
My apologies Serene.
6 years ago
Boey Wai Yen
Thanks for a very clear model, Xavier Sng! I would argue that your interpretation can be considered valid as well.
6 years ago
Xavier Sng
They say English is a language created for controversies! I reckon I should have paid attention to the word "any". Thank you once again Wai Yen.
6 years ago
Boey Wai Yen
With more than one possible interpretation, perhaps for PSLE, probably good to also write out the configuration in our model also, and let the markers discuss to decide if they are willing to accept an alternative configuration from the intended original. Who know? Might have been awarded marks for the WWMMMM config. 😅
6 years ago
Boey Wai Yen
Thank you, Xavier Sng. Your method of solving is very clear. :)
6 years ago
Xavier Sng
You are too kind, thank you.
6 years ago
Serene Koon
I tot model answer 11 was incorrect when Xavier answer 18 was same as mine. I have misinterpreted wwmmmmww (4men b/w any 2women),
6 years ago
Serene Koon
So sorry, I shd have state the answer given.
6 years ago
Xavier Sng
Not your fault Serene. This is a good thing because we get to see how different interpretations can result in different outcomes. It is a good learning curve for all. :)
6 years ago
Xavier Sng
This goes to show how important it is for setters to check the wordings and ensure that the picture is clear for our children. If there are differences in interpretation for adults, imagine how much more intimidated the children will be. Let us all help contribute and work towards better worded questions.
6 years ago
Mayuree Thongpan
This is my kid's way
6 years ago
Mayuree Thongpan
But this is my way 😁
6 years ago
Serene Koon
I did the same but time consuming
6 years ago
Mayuree Thongpan
Yes, my kid got answer faster
6 years ago
Xavier Sng
Good morning. I had held a whatsapp discussion with two HODs and a mathematics coach from one of the premier enrichment centres about the wording of this question.
6 years ago
Xavier Sng
Just a suggestion. Perhaps the question should be so worded for better clarity :
53 people stood in queue for a roller coaster ride at the Universal Studio. The women were each separated by at least/no fewer than 4 men. What was the largest possible number of women in the queue?
Ha..ha...we made stupid mistake trying to find perimeter of shaded parts .
6 years ago
Xavier Sng
:) we have all been there, Serene. lol
6 years ago
Serene Koon
Asked 9 years ago
SG
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Primary 6
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Number and Algebra
Pls help P6 math.TIA.
Replies
19
Caleb Tey
do you have the answer key? I had decimal places, so wanting to check with you on this.
6 years ago
Serene Koon
yes, 240
6 years ago
Serene Koon
Appreciate if you can guide us how to get ans .240. TIA
6 years ago
Caleb Tey
240 means 70piece 2$ and 20pieces 5$. the problem is, if this is true, and I move 10 pieces over, it will be 60 vs 30, which is 1/2 rather than 2/5 as per the question. This made me unsure of myself so don't think I have the answer.
6 years ago
Xavier Sng
6 years ago
Serene Koon
Thank Caleb Tey. Hopefully someone can help
6 years ago
Serene Koon
Thanks Xavier Sng. Will need sometime to digest.
6 years ago
Xavier Sng
Caleb, the ten pieces of $2 notes are exchanged for 4 pieces of $5 notes. Please construct one of your super duper models for Serene, thank you.
6 years ago
Caleb Tey
Oh. I read it as 10 for 10
6 years ago
Xavier Sng
The question can be less ambiguous if it states that ten pieces of $2 notes were exchanged for $5 notes of equivalent value.
6 years ago
Xavier Sng
Not to worry, Serene. Please let me know if you need clarification. Regards
6 years ago
Xavier Sng
I am quite sure Caleb's model will clear up any doubts, so we are counting on you, Caleb!
6 years ago
Caleb Tey
6 years ago
Caleb Tey
this is the 1st one where 10 pieces of $2 change for 10 pieces of $5.
6 years ago
Caleb Tey
6 years ago
Caleb Tey
this is the 2nd one where 10 pieces of $2 change for equal value in $5.
6 years ago
Caleb Tey
Crux is this - WHAT is the common factor. Both same approach but the defining point of common factor, totally different
6 years ago
Xavier Sng
You will save yourself a lot of trouble if you focus on the number of notes rather than on the total value amount of each types of notes. This sort of question deals with two quantities (the number of notes and the value of the notes) and many students get very confused because they try to relate the total values to the number of notes.
6 years ago
Serene Koon
Many thanks to both of u working together with detailed explanation n models