Tutor MathsGuru: Ask me for your burning Maths questions!
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softcoach:
Hi softcoach,Hi
Appreciate help to solve the problem sum below (P5):
40% of the animals on a farm were chickens and the rest were ducks. When another 104 chickens and ducks were bought, the number of chickens was increased by 20% and the number of ducks was increased by 30%.
(a)\tFind the number of chickens on the farm at first, and
(b)\tthe number of ducks on the farm after the increase.
Thank you.
Initially, number of chickens to number of ducks
= 40% : 60%
= 20u : 30u >> total 50u
After 104 chickens and ducks were bought,
number of chickens increased by 20% >> 20u X 120% = 24u
number of ducks increased by 30% >> 30u x 130% = 39u
so after purchase of 104 chickens and ducks,
number of chickens to number of ducks
= 24u : 39u >> total 63u
so 63u - 50u = 104, 13u = 104, 1u = 8
a) Number of chickens on the farm, at first = 20u = 20 x 8 = 160
b) Number of ducks on the farm, after increase = 39u = 39 x 8 = 312
cheers. -
Need help on this qn. Thanks.
The volume of water in bottle P was 3/5 of that in bottle Q. After 60ml of water was added to bottle P and 20ml was poured away from bottle Q, the amt of water in bottle P was 3/4 that in bottle Q.
What was the amt in each bottle at first? -
Please help on this P2 qn, thanks!
In fairyland, every elf has either 1 or 2 eyes. Every elf also has either 1,2 or 3 feelers.
The elves in fairyland greet each other when they have either more eyes or feelers than the other.
a) how many elves are there in fairyland?
b) at a party where all elves attends, how many greetings will there be? -
Hi MathIzzzFun
Appreciate your help . Thanks !
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sanie:
Old ratio P : Q = 3 : 5Need help on this qn. Thanks.
The volume of water in bottle P was 3/5 of that in bottle Q. After 60ml of water was added to bottle P and 20ml was poured away from bottle Q, the amt of water in bottle P was 3/4 that in bottle Q.
What was the amt in each bottle at first?
P [--][--][--] (= 3*[--])
Q [--][--][--][--][--] (=5*[--])
After 60ml of water was added to bottle P and 20ml was poured away from bottle Q
P [--][--][--] + [---60---]
Q [--][--][--][--][--] - [-20-]
New ratio P : Q = 3 : 4
P [--][-20-][--][-20-][--][-20-]
Q [--][-20-][--][-20-][--][-20-][--][-20-]
Compare the models of Q ,
[--][--][--][--][--] - [-20-] -----> [--][-20-][--][-20-][--][-20-][--][-20-]
[--] -----> 100
3*[--] -----> 300
5*[--] -----> 500
the amount of water in P at first = 300 ml (Ans)
the amount of water in Q at first = 500 ml (Ans) -
jieheng:
Thank you so much! Your model is much easier to understand
Old ratio P : Q = 3 : 5sanie:
Need help on this qn. Thanks.
The volume of water in bottle P was 3/5 of that in bottle Q. After 60ml of water was added to bottle P and 20ml was poured away from bottle Q, the amt of water in bottle P was 3/4 that in bottle Q.
What was the amt in each bottle at first?
P [--][--][--] (= 3*[--])
Q [--][--][--][--][--] (=5*[--])
After 60ml of water was added to bottle P and 20ml was poured away from bottle Q
P [--][--][--] + [---60---]
Q [--][--][--][--][--] - [-20-]
New ratio P : Q = 3 : 4
P [--][-20-][--][-20-][--][-20-]
Q [--][-20-][--][-20-][--][-20-][--][-20-]
Compare the models of Q ,
[--][--][--][--][--] - [-20-] -----> [--][-20-][--][-20-][--][-20-][--][-20-]
[--] -----> 100
3*[--] -----> 300
5*[--] -----> 500
the amount of water in P at first = 300 ml (Ans)
the amount of water in Q at first = 500 ml (Ans)
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softcoach:
HiHi MathIzzzFun
Appreciate your help . Thanks !
you are welcome :lol:
cheers. -
Need help
2) a figure is made up of 2 identical squares. 1/6 of each square is shaded. What fraction of the whole figure is shaded?
Ans: 1/11
3) 3/5 are $50. 2/3 of the remainder are $10 and $5 notes and the rest are $2 notes. He had twenty four $2 notes. The number of $10 notes is 1/7 of the number of $5 notes. What is the number of $10 notes he has?
Ans: 4
Thank you :? -
Chan09:
Take the cake and divide into 6 parts.Need some help :stupid:
Harry and 5 friends share a cake equally for tea. If Harry gave away 2/3 of her share, what fraction of the cake had she left?
Ans: 1/18
So Harry gets 1/6 of the cake. Since she gave away 2/3 of her share, she has 1/3 * 1/6 = 1/18 of the cake left. -
Hi, pls help to solve the following Maths sums with model, thks.
David had some apples in a box.
He sold 47 apples.
He bought another 25 apples and threw away 60 rotten ones.
He then had 123 apples left.
How many apples did David have at first.
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