Q&A - P3 Math
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tracywham:
hi tracywham,Hi, can i get someone to englighten me in solving this question as in model drawings? Thanks.
Book store A has 40 fewer magazines than book store B. If 130
magazines are transferred from book store B to book store A, there will
be twice as many magazines in book store A as in book store B. How many magazines are there altogether?
this is how u draw the model in one (although it might be easier to see if u try to draw 2 models (before and after))
![](\"http://i45.tinypic.com/16412p.png\")
http://i45.tinypic.com/16412p.png\">
from model,
in the end, B will have 1 unit = 90 + 90 + 40 = 220
A will have 2 units = 2 x 220 = 440
Total = 220 + 40 = 660 -
tracywham:
Hi, can i get someone to englighten me in solving this question as in model drawings? Thanks.
Book store A has 40 fewer magazines than book store B. If 130
magazines are transferred from book store B to book store A, there will
be twice as many magazines in book store A as in book store B. How many magazines are there altogether?![](\"http://i46.tinypic.com/9giosh.jpg\")
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Big Thanks to both of you…I’ve a clearer view on model drawing now… ^_^
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How to do this question without guess n check?
The diff between two numbers is 240. When 1 number is divided by the other number, the quotient is 5. Find the sum of these two number. -
cathycho:
Hi cathycho,How to do this question without guess n check?
The diff between two numbers is 240. When 1 number is divided by the other number, the quotient is 5. Find the sum of these two number.
1st number is 5 units and 2nd number is 1 unit
4 units -> 240
1 unit -> 60
6 units -> 360
Cheers :celebrate: -
Thks, dazzlego…
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Please help to solve.Thanks very much!
1. A, B and C baked a totl of 119 cookies. A sold 5/11 of her share while B ate 15 cookies from her share. The number of cookies C ate was 3/5 the number of cookies A sold.If each of them has the same number of cookies left, how many cookies did C bake?
2. Pail X, Y and Z contained 6800ml of water altogether. 1/6 of the water in Pail Z and 500ml of water in Pail Y were poured out. THe volume of water poured out from Pail X was 5 times the volume of water poured out from Pail Z. Given that the 3 pails had the same volume of water left, find the volume of water in Pail Y at first. -
AgonyMum:
Help u to do question 1Please help to solve.Thanks very much!
1. A, B and C baked a totl of 119 cookies. A sold 5/11 of her share while B ate 15 cookies from her share. The number of cookies C ate was 3/5 the number of cookies A sold.If each of them has the same number of cookies left, how many cookies did C bake?
2. Pail X, Y and Z contained 6800ml of water altogether. 1/6 of the water in Pail Z and 500ml of water in Pail Y were poured out. THe volume of water poured out from Pail X was 5 times the volume of water poured out from Pail Z. Given that the 3 pails had the same volume of water left, find the volume of water in Pail Y at first.
Then u can solve question 2 using the same concept
Assume A baked 11 units of cookies. He sold 5 units so in the end, he is left with 6 units.
B and C will have 6 units each in the end too.
Since C ate 3/5 of A (3 units), at first C baked 6+3 = 9 units.
At first, B = 6 units + 15
Total no. of cookies at first = 11u + 9u + (6u + 15) = 26u + 15
26u -> 119 - 15 = 104
1u -> 104 ÷ 26 = 4
C -> 9u -> 9 × 4 = 36
Cheers :celebrate:
Good luck for question 2!!
Answer should be 2 Litres :salute: -
Anyone can help to interpret a problem sum in my DS SA2 Maths? I find the question quite confusing:-
Mr Yeong had to paint the chairs in the hall red or blue. After he had painted 1567 chairs, Mr Yeong still had another 865 chairs to paint. Given that he painted 769 chairs red, how may chairs were painted blue?
Thanks in advance! -
I try...
1567+865=2432 (total no. of chairs)
2432-769 red chairs=1663 blue chairs
That's my guess at how most kids will answer this.
BUT i find the phrasing open to interpretation.
-- After he had painted 1567 chairs, Mr Yeong still had another 865 chairs to paint. Given that he painted 769 chairs red, how may chairs were painted blue?
Seems like the 865 chairs is a red herring that should be ignored, since Mr Yeong had actually painted only 1567 chairs. So out of that, 1567-769=798 were painted blue.
What was the given answer?
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