Q&A - PSLE Math

[2632parent]

Thank you councillor for your speedy reply, sorry I have another question for you.


1) Packet A, Packet B and Packet C each contained some salt. At first, there were 200g more salt in Packet A than Packet b. Packet C had 3/4 of the amount of salt in Packet A. After 1/8 of the amount of salt in Packet A was transferred to Packet B, there was 82.15g of salt in Packet B. How many percent less salt were there in Packet C than in Packet A at first?

Many many thanks

[tianzhu]

2632parent:

Thank you councillor for your speedy reply, sorry I have another question for you.


1) Packet A, Packet B and Packet C each contained some salt. At first, there were 200g more salt in Packet A than Packet b. Packet C had 3/4 of the amount of salt in Packet A. After 1/8 of the amount of salt in Packet A was transferred to Packet B, there was 82.15g of salt in Packet B. How many percent less salt were there in Packet C than in Packet A at first?

Many many thanks

Hi

Packet C had 3/4 of the amount of salt in Packet A.

A ------ 4 units

C ------- 3 units

C ------- 1 unit less than A

% ------- ¼*100% ------- 25%

Best wishes

[2632parent]

Ha! Ha! What a simple solution. get confused with all the extra information given. This is actually a 5 marks question from Nanyany primary school preliminary paper 2011. Thank you so much for your help.

[zanen]

in a test of fuel consumption, two cars, P and Q, each travel a distance of 720km.

For every litre of petrol used, Car Q travels 3km more than Car P.
Car P uses 12 litres of petrol more than Car Q.
Find the number of litres of petrol each car has used for the journey.
please help me as i am taking retake prelim tmr. thanks

[niza6666.028774hotmail.028774com]

Hi I need help on this question. Please help, thanks in advance.

Miss Lee baked some pies to sell at a fun fair. 4/5 of them were beef pies while the rest were chicken pies. At the end of the fun fair, she sold 100 chicken pies and 7/8 of the beef pies. 1/6 of the pies remained unsold. If each pie cost $2.50, how much did Miss Lee collect from the sale of the pies?

[2DMommy]

Please help me with these questions :


1) Paris had a total of 1686 red, blue, green marbles for sales. The ratio of the number of red marbles to the number of blue marbles is 2:3. After Paris sold 75% of the blue marbles and 50% of the green marbles and none of the red marbles, she had 922 marbles left. How many blue marbles were there at first ?

2) If Sam gives Terry $350, he will have 4 times as much money as Terry. If Sam gives Terry $550, he will have thrice as much money as Terry. How much money does Sam have ?

Thank you !

[whitety]

Hi, need help on this qn.


In a bag, there are 20-cent and 50-cent coins. There are 28 more 20-cent coins than 50-cent coins but the total amount of 50-cent coins is $3.40 more than that of the total amount of 20-cent coins. How many 50-cent coins are there in the bag?

Thanks!

[zanen]

in a test of fuel consumption, two cars, P and Q, each travel a distance of 720km.

For every litre of petrol used, Car Q travels 3km more than Car P.
Car P uses 12 litres of petrol more than Car Q.
Find the number of litres of petrol each car has used for the journey.
please help me as i am taking retake prelim tmr. thanks

[zanen]

Containers A and B are each filled with water.If the water from container B is poured into container A until container A reaches the brim, there wil be 12 litres of water left in container B. If the water from container A is poured into container B until container B reaches tbe brim, there will be 34 litres of water left in container A. The ratio of the capacity of container A to the capacity of container B is 2:1. How many more litres of water are needed to fill both tanks to their brim? please help thanks. my prelim retest tmr.

[zanen]

A car and a lorry were travelling towards Sunshine Park. When the car overtook the lorry, they were 260km away from Sunshine Park. The car arrived at Sunshine Park 2.5h earlier than the lorry. When the car reached Sunshine Park, the lorry was still 100km away. Find the speed of the car and the lorry.please help thanks. my prelim retest tmr.