Q&A - PSLE Math

[ftwm]

Question;


Jeffrey, Caroline and Belinda need to sell some movie tickets which cost $5.50 each. Jeffrey sold 4/7 of the tickets and Caroline sold 4/5 of the no. of tickets Belinda sold. Belinda sold 91 fewer tickets than Jeffrey. How much money did they collect altogether from the tickets they sold?

[ftwm]

Q pls help;


3 women donated some money to an orphanage. The amount of money that Ann donated to the total amount of money that Bonnie and Carol donated was 3 : 5. The amount of money that Carol donated to the total amount of money that Ann and Bonnie donated was 2 : 3. Carol donated $35 more than Bonnie.
(a) How much money did the 3 women donate altogether?
(b) How much money did Ann donate?

[ftwm]

Q;


Edwin and George had a total of 330 stamps. Edwin had 20% more stamps than George. Edwin started by giving 30% of his stamps to George. Then, George in return gave 25% of his stamps to Edwin. How many more stamps must Edwin give to George so that they have the same number of stamps in the ant?

Tq

[wahwah]

Hi,

Need help again. Many thanks in advance.

In school A, there were 580 boys and 868 girls. In school B, there were 1420 boys and 382 girls. Some children were transferred from school A to school B. as a result, 40% of the children in school A and 75% of the children in school B were boys. How many children were transferred from school A to school B?

[Maths Hub]

ftwm:

Hi pls help e Q;


Town A and Town B were 60km apart. Mrs Leong left Town A and cycled towards Town B at 11 a.m. at an average speed of 12 km/h. At the same time, Mr Sim left Town B and cycled towards Town A at an average speed of 18km/h. They met each other along the way and continued to cycle without stopping at the same speed.

(a) At what time did they meet each other?

(b) How far was Mrs Leong from Town B when Mr Sim reached Town A?

Hi,

a) Since every hour, they are 18+12=30 km closer, it will take 60/30=2h for them to meet each other.
Time--> 2 hours after 11am --> 1pm
b) Time taken for Mr Sim to reach Town A--> 60/18 = 3 1/3
Distance Mrs Leong has travelled--> 3 1/3 X 12 = 40km
Ans: 60 - 40 = 20 km

Cheers.

[Maths Hub]

ftwm:

Question;


Jeffrey, Caroline and Belinda need to sell some movie tickets which cost $5.50 each. Jeffrey sold 4/7 of the tickets and Caroline sold 4/5 of the no. of tickets Belinda sold. Belinda sold 91 fewer tickets than Jeffrey. How much money did they collect altogether from the tickets they sold?

J : Total of B+C
4 : 3

B : C : Total of B+C
5 : 4 : 9

We need to make Total of B+C the same
J : Total of B+C
4 : 3
12 : 9

B : C : Total of B+C
5 : 4 : 9

Combining both ratios:
J : B : C
12 : 5 : 4

12-5=7
7 units difference--> 91
1 unit--> 91/7 = 13
12 + 5 + 4 = 21
21 units --> 21 X 13 = 273

Hope that helps!

[Maths Hub]

ftwm:

Q pls help;


3 women donated some money to an orphanage. The amount of money that Ann donated to the total amount of money that Bonnie and Carol donated was 3 : 5. The amount of money that Carol donated to the total amount of money that Ann and Bonnie donated was 2 : 3. Carol donated $35 more than Bonnie.
(a) How much money did the 3 women donate altogether?
(b) How much money did Ann donate?

A : Total of B+C : Total of A+B+C
3 : 5 : 8

C : Total of A+B : Total of A+B+C
2 : 3 : 5

Since the total is the same, we need to make the total units of both ratios the same.

A : Total of B+C : Total of A+B+C
3 : 5 : 8
15 : 25 : 40

C : Total of A+B : Total of A+B+C
2 : 3 : 5
16 : 24 : 40

Combining both ratios:
A : B : C
15 : (40-15-16)=9 : 16

7 units difference-->$35
1 unit--> 35/7=$5
a) 40 units--> 40X5=$200
b) 15 units-->15X5=$75

Hope that helps.

[Maths Hub]

ftwm:

Q;


Edwin and George had a total of 330 stamps. Edwin had 20% more stamps than George. Edwin started by giving 30% of his stamps to George. Then, George in return gave 25% of his stamps to Edwin. How many more stamps must Edwin give to George so that they have the same number of stamps in the ant?

Tq

At the start,
Let Edwin --> 120/220X330=180 stamps
George --> 330-180=150 stamps

Edwin started by giving 30% of his stamps to George..
Edwin--> 180X70%=126
George--> 330-126=204

Then, George in return gave 25% of his stamps to Edwin..
George--> 204X75%=153
Edwin--> 330-153=177

In order for them to have the same number, they both must have
330/2=165 stamps

Therefore, 165-153=12 must be given.

Hope that helps.

[Maths Hub]

wahwah:

Hi,

Need help again. Many thanks in advance.

In school A, there were 580 boys and 868 girls. In school B, there were 1420 boys and 382 girls. Some children were transferred from school A to school B. as a result, 40% of the children in school A and 75% of the children in school B were boys. How many children were transferred from school A to school B?

In the end:
School A:
Boys : Girls
2 u : 3 u

School B
Boys : Girls
3 p : 1 p

Total Boys-->580+1420=2000 (2u + 3p)..........(1)
Total Girls-->868+382=1250 (3u + 1p)............(2)

(2)X3: 9 u + 3 p ---> 3750.............................(3)
Comparing (1) and (3)
7 u-->3750-2000=1750
1 u-->1750/7=250
We find 5 units to find the number of students in A in the end.
5 u-->1250

Therefore a total of 580+868-1250=198 was transferred.

Hope that helps.

[ftwm]

Thanks Maths Hub it was a great help :thankyou: