PSLE Maths Question, Pls Help Me !!!
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Question :
If 30% of the fish are transferred from Aquarium A to Aquarium B, they will have the same number of fish, If 100 fish are transferred from Aquarium A to Aquarium B, AquariumB will have 80% more fish than Aquarium A
(a) How many per cent more fish are there in Aquarium A than in Aquarium B?
(b) How many fish are there in Aquarium A?
Anyone care to help? Thanks in Adv to all who reply
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didnt noe solving psle maths make ppl geniuses.
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(a)Originally posted by soloman2k5:
Question :
If 30% of the fish are transferred from Aquarium A to Aquarium B, they will have the same number of fish, If 100 fish are transferred from Aquarium A to Aquarium B, AquariumB will have 80% more fish than Aquarium A
(a) How many per cent more fish are there in Aquarium A than in Aquarium B?
(b) How many fish are there in Aquarium A?
Anyone care to help? Thanks in Adv to the geniuses out there
0.7A = B + 0.3A ==> B = 0.4A
(A-B)/B × 100% = 0.6A/0.4A × 100% = 150%
(b)
1.8(A - 100) = B + 100 ==> B = 1.8A - 280
0.4A = 1.8A - 280
1.4A = 280
A = 200
B = 80
draw ur own bar models if necessary. -
Originally posted by ^tamago^:
why nowadays psle maths so hard? i still rmb 5 yrs ago dun haf such bull shit 1.
[b](a)
0.7A = B + 0.3A ==> B = 0.4A
(A-B)/B × 100% = 0.6A/0.4A × 100% = 150%
(b)
1.8(A - 100) = B + 100 ==> B = 1.8A - 280
0.4A = 1.8A - 280
1.4A = 280
A = 200
B = 80
draw ur own bar models if necessary. [/b] -
Not to be mean, but dun how to do maths, must be in Agony meh??
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Originally posted by gd4u:Not to be mean, but dun how to do maths, must be in Agony meh??
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i dunno how to do leh..how..
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I sitted for PSLE more than 10 years ago and came across such challenging questions. These type of questions (mostly question 46 and onwards and most of the time is 4 or 5 marks questions). Drawing models is a must, if didn't draw will be difficult to solve these challenging questions. When I'm in pri school really can score these questions easily and always got A* for my Maths paper. But my sec school de always failOriginally posted by popmynutsy:why nowadays psle maths so hard? i still rmb 5 yrs ago dun haf such bull shit 1.
maybe it's more on memorizing formulaes.
I once went for a interview test for promotion (at work) and was quite surprise to see unrelated challenging pri sch maths questions being used in the test. -
you got the answers?Originally posted by soloman2k5:
Question :
If 30% of the fish are transferred from Aquarium A to Aquarium B, they will have the same number of fish, If 100 fish are transferred from Aquarium A to Aquarium B, AquariumB will have 80% more fish than Aquarium A
(a) How many per cent more fish are there in Aquarium A than in Aquarium B?
(b) How many fish are there in Aquarium A?
Anyone care to help? Thanks in Adv to all who reply cause I seem to be getting decimal point answers. Haha maybe grow older mind turning rusty . -
Ur interview test was at a primary school ? maybe they testing whether teachers can solve such tough qnsOriginally posted by Phoebie:I sitted for PSLE more than 10 years ago and came across such challenging questions. These type of questions (mostly question 46 and onwards and most of the time is 4 or 5 marks questions). Drawing models is a must, if didn't draw will be difficult to solve these challenging questions. When I'm in pri school really can score these questions easily and always got A* for my Maths paper. But my sec school de always fail maybe it's more on memorizing formulaes.
I once went for a interview test for promotion (at work) and was quite surprise to see unrelated challenging pri sch maths questions being used in the test. -
Originally posted by RaaRaa:Ur interview test was at a primary school ? maybe they testing whether teachers can solve such tough qns I'm working in a place where teachers, professors, lecturers come .
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Must draw graphs to fully understand. Got more questions can post here. The uncles and aunties here will help you
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Sitted.Originally posted by Phoebie:I sitted for PSLE more than 10 years ago and came across such challenging questions. These type of questions (mostly question 46 and onwards and most of the time is 4 or 5 marks questions). Drawing models is a must, if didn't draw will be difficult to solve these challenging questions. When I'm in pri school really can score these questions easily and always got A* for my Maths paper. But my sec school de always fail maybe it's more on memorizing formulaes.
I once went for a interview test for promotion (at work) and was quite surprise to see unrelated challenging pri sch maths questions being used in the test.
Yeah. -
Originally posted by charlize:Sitted.
Yeah. sat . Maths solving become English grammer correcting . Thanks Charlize for pointing out the grammar mistake . -
Where did all the apple and orange Q disappear to nowadays?
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Fade Away
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Grammar.Originally posted by Phoebie: sat . Maths solving become English grammer correcting . Thanks Charlize for pointing out the grammar mistake .
Your first "grammar" spelt wrongly. -
Originally posted by charlize:Grammar.
Your first "grammar" spelt wrongly. -
use statistical graphic calculator to solve this Qs lah
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I only encounter 1 such question in maths for PSLE and its more like application of Algebra. The main lessons are only covered during secondary 1 and 2.
A=200 and B=80 is correct. The answers to the questions can be derived from these figures. -
why nowadays psle maths so hard? i still rmb 5 yrs ago dun haf such bull shit 1.[/b][/quote]
now psle very hard 1 loh, every year getting harder. last time dey wun expect you to answer such chim qus 1