Thank you so much. Now I understand.

Why do you use multiple of 9? and why is 27 chosen instead of other numbers like 18? So sorry don’t really understand. Thanks

Pail A contained 7/17 of the amount of water in Pail B. Pail C contained 1/9 of the total amount of water the three pails had. If Pail A and Pail B contained 5.25 litres of water more than Pail C, how much water did Pail B contain? (give the answer in litres)

Please help me with another question that I cannot figure out:Please help me I don’t know where to find the answer!! Help!!


Alan, Bill and Carl started $372. After Alan spent 2/5 of his share, Bill spent 1/2 of his share and Carl spent 1/3 of his share, the boys found that they have the same amount of money left.

1. What is the ratio of Alan’s share to Bill’s share to Carl’s share?
(express your answer in the simplest form)

2. How much did they spend altogether?

Please help me as my son’s exam is tomorrow. I still cannot solve the problem here.


Ken had three times as many apples as papays, After selling 160 apples and 25 papayas, he had twice as many papayas as apples left. How many fruits did he have at first?

The number of the marbles in Box A, Box B and Box C was 195. John added 60 marbles to those in Box A, doubled the number of marbles in Box B and halved the number of marbles in Box C. The ratio of the number of marbles become 4:1:2. What is the total number of marbles in the three boxes now?

There were 280 people at the concert. 1/4 of the males and 1/5 of the females wore glasses. Given that a total of 60 people wore glasses in the concert, how many female wore glasses?

In 2008, there were 883 pupils in Greenwood Primary School and 1/3 of them were girls. After merging with Blackforest Girls’ School in 2009, 3/4 of the pupils in the merged school are now girls.


How many girls were from Blackforest Girls School?

Mrs Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun cost $10 less than a teddy bear. The total cost of toy guns is $490 more than the cost of teddy bears.


a) how much did Mrs Tan spend on the teddy bears?

b) how much did one teddy bear cost?

Marie, Jonathan and David shared a sum of money. The total amount of money received by Jonathan was 2/3 the amount ofmoney received by David. Marie received twice as much as what Jonathan and David received. After Marie had given $48 to Jonathan and $27 to David, Jonathan gave $3 to David. In the end, 3 of them had the same amount of money. Find the difference between the amount of money that Marie and Jonathan had at first.