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[MathIzzzFun]

htn:

MathIzzzFun:

[quote=\"htn\"]Can anybody help me?

Jane bought some pizzas for her friends. Her girl friends received twice as many as her boy friends. She has an equal number of girl and boy friends. Each boy friend ate 4/7 of a pizza and they finished all the pizza given to them.
Each girl friend ate 1/3 of a pizza and they had 8 1/2 pizza left. How many pizza did Jane buy?

Hi

ratio of number of pizzas eaten by boys : number of pizzas eaten by girls
= 4/7 : 1/3
= 12u : 7u

The girls had twice the number of pizzas the boys had, so total number of pizzas the girls had = 2 x 12u = 24u

24u - 7u = 8.5 pizzas
17u = 8.5 pizzas
1u = 0.5 pizza

Total number of pizza = 12 u + 24u = 36u = 36 x 0.5 = 18 pizzas

cheers.

MathIzzzFun

Thanks. can help the following q?

There are more toys in container x and container y. 30% of the toys in container x is more than 40% of the toys in container Y. If 50% of the toys in Container X is transferred into container Y, there will be 300 more toys in Container X and than Y.

a) How many percent more toys are there in Container X and Container Y?
b) How many toys are there in Container Y?[/quote]Hi

pls check question - some information is missing eg how much is 30% of x more than 40% of y and after transferring 1/2 of X into Y, X cannot have more toys than Y because container Y would have 1/2 X + Y

cheers.

[2DMommy]

Hi, need help with this question :


Bill, Sam and John had gone to BORDERS to buy some books. Bill spent 3/5 as much money as Sam and John. Sam spent 1/5 as much money as Bill and John. If John spent $20 more than Bill, how much did they spend altogether ?\t

Thanks !

[mrchew]

B : SJ … S : BJ

3 : 5 … 1 : 5

The total units for BSJ must be the same. Common multiple for 8 and 6 is 24.
So the new ratio is
B : SJ … S : BJ
9 : 15 … 4 : 20

B = 9u so J = 20u - 9u = 11u
2u = $20
24u = $20 x 12
= $240

[2DMommy]

Hi mrchew,

Thank you for working out the sum.
I forgot that ratio can be used and kept drawing models. The more I drew, the more confused we get

[Superbugs]

P5 Maths Question


The figure is made up of 3 squares, A,B and C overlapping each other. The area of Square A is 20% of the area of Square B and the area of Square B is 60% of the area of Square C. What percentage of the figure is shaded?

A\t\tC
\t\t
\t\t
\t\t
\tB\t
\t\t
Appreciate help on this question. Tks!

[Superbugs]

P5 question:

The ratio of Sammy’s age t Peter’s age is 10:7. In 8 years’ time, the ratio will become 4:3. What is Sammy’s age now?

Appreciate help. Tks

[Superbugs]

P5 question:


The average mass of a group of pupils was 28kg. When Mr Lim measured and recorded the mass of these pupils, he wrongly recorded one pupil’s weight as 53kg when it should be 35kg. As a result, the average weight of the pupils was recorded as 29kg. How many pupils were there?

Need help on the above question. Tks

[Superbugs]

P5 Question:


The ratio of the amount of money Jenny had to the amount of money Siti had was 3:4. The next day, their parent gave each of them some money. Siti received twice as much as Jenny. The ratio then became 5:8. If both girls had a total of $70 at first, how much did Siti receive?

Pls help.

[Superbugs]

P5 Question:


In a Mathematics quiz, pupils who answered each question correctly will be awarded some points according to the topic related as shown in the table below:

Topics Points Awarded
Fractions 3 points
Geometry 4 points
Volume 5 points
Percentage 6 points

The number of questions on Fractions, Geometry, Volume and Percentage were in the ratio 5:4:3:2 respectively. Weiling answered all the quiz questions on Fractions and Geometry correctly, but she had got only 1/3 of the questions on Volume correct and scored 0 for questions on Percentage. If Weilling scored 108 points for her quiz,

a) how many questions on Percentage were there in the quiz?
b) How many questions were there in the quiz?

Pls help on thsi question, Tks

[MathIzzzFun]

Superbugs:

P5 Maths Question


The figure is made up of 3 squares, A,B and C overlapping each other. The area of Square A is 20% of the area of Square B and the area of Square B is 60% of the area of Square C. What percentage of the figure is shaded?

A\t\tC
\t\t
\t\t
\t\t
\tB\t
\t\t
Appreciate help on this question. Tks!

Hi

Can you post the image - I believe some information is missing.

cheers.