Q&A - PSLE Math

[pixiedust]

Thank you, mathizzzfun. This morning when I look at it again, I got it. So simple yet I took so long :oops: Thanks again.

[chrisu]

Just as I expected, the answer is $14.90 given by the teacher. The teacher will explain tomorrow.

chrisu:

Thanks. I also got the same $31. Unless the 15% is of 50c and 20c altogether.

tianzhu:

[quote=\"chrisu\"]Pls help;

Tony had 15% more 50c coins than 20c coins. If there were 6 more 50c coins than 20c coins, how much money did Tony have?

Note : This question is from My Pals are here, Maths Test 6 pg.70 Q40. My DD is $31 but teacher said wrong. No answer given yet.

Hi

I did a quick check and I think $31 is correct.

Best wishes

[/quote]

[MathIzzzFun]

pixiedust:

Thank you, mathizzzfun. This morning when I look at it again, I got it. So simple yet I took so long :oops: Thanks again.

Hi pixiedust,

you are welcome :lol: it's normal for us to get \"choked\" - I too get choked at times.. this forum is great cos it offers various approaches to solving the same problem.

cheers.

[BlueBells]

chrisu:

Pls help;


Tony had 15% more 50c coins than 20c coins. If there were 6 more 50c coins than 20c coins, how much money did Tony have?

Note : This question is from My Pals are here, Maths Test 6 pg.70 Q40. My DD is $31 but teacher said wrong. No answer given yet.

Problem with image, so here goes my workings :


15% => 6 more 50c coins, so if total number of coins =100%

Then, Tony would have 65% 50c coins and 35% 20c coins

Since
15% = 6 more 50c coins,
85% = (6 x 85) / 15 = 34 coins

34 / 2 = 17 50c coins and 17 20c coins

Thus, Tony would have
[(17 + 6) x $0.50] + (17 x $0.20) = $14.90

[tianzhu]

chrisu:

Just as I expected, the answer is $14.90 given by the teacher. The teacher will explain tomorrow.

Hi

Interesting, please share the teacher’s solution after you receive it.

If the question is worded exactly like what it’s described, the answer is $31.

Best wishes

[peggy]

Hi,


Need help for this !!
Preferably with MD, DS can understand better.

P5 qtn - Miss Lim bought beads just enough to distribute to the members of the Art Club. Each member would receive 10 beads.
However, when 15 more members joined the club, each member could only receive 7 beads, with 60 beads remaining.
How many members were there in the Art Club at first ??

Thanks !

[tianzhu]

Hi peggy


A quick one,rearranged the question in another way into a familiar type of question.

Miss Lim bought beads just enough to distribute to the members of the Art Club. Each member would receive 10 beads.
However, if each member were to receive 7 beads, there would be 165 beads remaining(165 ------ (15*7) + 60). How many members were there in the Art Club at first?

10 – 7 ----- 3
165/3 ----- 55

Best wishes

[peggy]

Hi Tianzhu,


You are really super fast…thanks !

Any MD when you are free ? My DS seems to be able to understand better with MD.

Appreciate your help !!

[tianzhu]

peggy:

Hi Tianzhu,


You are really super fast.....thanks !

Any MD when you are free ? My DS seems to be able to understand better with MD.

Appreciate your help !!

Hi

You’re welcome.

I’ll draw the MD at a later time.

Best wishes

[tianzhu]

Hi peggy


This question looks tricky at first glance, however, it can be rearranged into a familiar question.

Try to view it from another angle and perspective.

7 beads for 15 new members ------ (15*7) ----- 105

105 + 60 ------ 165 which is the remaining number of beads after the original members were given 7 beads each.

Now restate the question in this way,

Miss Lim bought beads just enough to distribute to the members of the Art Club. Each member would receive 10 beads. However, if each member were to receive 7 beads, there would be 165 beads remaining. How many members were there in the Art Club at first?

Does it now look similar to this question which is a common question on Gap and Difference?

Mr Tan had some charity tickets. If he sends 4 tickets each to some companies, he will need 20 more tickets. However, if he sends 3 tickets each to the same companies, he will have a remainder of 50 tickets. How many tickets does he have?

Hope this helps.

Best wishes

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