umaisarah:Hi, it 's from Pei Chun CA 1 2013 P6 paper.janicelhl:hi, thanks. i also think that there is a problem with the question.
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Actually, there's one more thing wrong with the question. It doesn't put a limit on the number, so it can be 33, then 39, then 45 etc Pattern repeats itself. Is the question from your DC's school?
Latest posts made by janicelhl
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RE: Q&A - PSLE Math
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RE: Q&A - PSLE Math
hi, thanks. i also think that there is a problem with the question.
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RE: Q&A - PSLE Math
umaisarah:
I tried Guess and Check, starting from 31, and omitting multiples of 6 and 7, but the pattern shows that it is impossible to get a number which will have combi of shortfall and remainder as above.janicelhl:
Hi please help.
A group of more than 30 students were asked to get into equal groups. If they were to group themselves into grouos of 6 ,there would be 2 students short. If they were to group into groups of 7 ,there would be 3 students left.
how many students in total were there in the group?
BUT, if you change it around, ie if group of 6, left 3 students, and if group of 7, short of 2, I get answer as 33.
ie if total is 33
yes, I also think there is problem with the question.
Groups of 6 = 5 groups (30), remainder 3
Group of 7 = 5 groups (35), short of 2
You can also get an answer if the combi is Group of 6, remainder 2, Group of 7 short of 3
Answer is 32
Group of 6 = 5 groups (30), remainder 2
Group of 7 = 5 groups (35), short of 3
If it's really a mistake in the question, then this is one of my BIGGEST pet peeve - when teacher set question wrongly, and student and parent almost go crazy, wasting precious time trying to do it. I find at least one mistake for every 10 questions the teacher set for homework for my DD problem sums.
Anyway, I stand corrected. I don't declare myself a math expert -
RE: Q&A - PSLE Math
Hi please help.
A group of more than 30 students were asked to get into equal groups. If they were to group themselves into grouos of 6 ,there would be 2 students short. If they were to group into groups of 7 ,there would be 3 students left.
how many students in total were there in the group? -
RE: Q&A - P5 Math
Hi, please help:
A fishmonger sold fish at $12.50 per kg. His weighing scale read 8% more than the actual mass. A customer bought a fish that had a mass of 5.4kg on this scale. Find the amounr of money the customer had overpaid for that fish.
answer sheet say is $5?? -
RE: Q&A - P3 Math
hi,please advise.
Siti shared 3 pizzas equally with 5 friends. What fraction of the pizza did each person get? -
RE: Where to get good and reasonable price for teeth braces
i am comparing now too. Is there a lot of different to do it at the private and with letter from school to do it in NDC? There are friends telling me to do it clinic near ur house so in case the braces are loosen , it easier to consult the dentist.
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RE: Q&A - P5 Math
hi please help:
Abdul bought 4 times as many candy bars as chocolate bars. The total mass of candy bars and chocolate bars was.1.64kg. The mass of chocolate bars was 0.84kg heavier than that of the candy bars. The mass of 1 bar of chocolate bar wad 0.228kg heavier than 1 bar of candy bar. Find the number of chocolate bars that Abdul bought. -
RE: Q&A - P5 Math
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