Level 3
The average number of playing cards Brendon and Ricky had was 450. The average number of playing cards Brendon and Jonas had was 240. If the ratio of Ricky's playing cards to Jonas's playing cards was 5 : 2, find the number of playing cards Brendon had.

Level 3
Mrs Yap had 40% more books than Mdm Zhang. Miss Lin had 20% fewer books than Mrs Yap. Mrs Yap and Mdm Zhang gave Miss Lin some books in the ratio of 1 : 4. As a result, Miss Lin had 50% more books than before. Given that Miss Lin had 423 more books than Mdm Zhang in the end, how many books did Mrs Yap give to Miss Lin?

Level 3
Oscar, Ethan and Fred had some balls. Ethan had 40% more balls than Oscar. Ethan had ³₅ of Fred's. After Oscar gave 18 balls to Ethan, he had ¹₂ of what Ethan had. How many more balls did Fred have than Ethan in the end?

Level 3
A carton packed with 1 packet of rice weighs 5.62 kg. The same carton when packed with 4 such packets of rice weighs 21.43 kg.

1. Find the mass of 1 packet of rice in kg.
2. Find the mass of the empty carton in kg.

Level 3
There were some avocados in 3 boxes, E, F and G. 30% of the number of avocados in Box E was equal to 60% of the number of avocados in Box F. The number of avocados in Box G was 60% of the total number of avocados in Box E and F. After Oscar removed 20% of the avocados in Box G, there were 88 more avocados in Box F than in Box G. In the end, how many avocados should be transferred from Box F to Box G so that the avocados in Box G would be the same as Box E?

Level 3
Jack, George, Henry and Asher shared $1495. Asher received ³₁₀ of the total amount of money received by Jack, George and Henry. Jack received ³₇ of the total amount for George and Henry. George received ²₃ as much money as Henry. If George gave all his money to Asher, how much did Asher have more than Jack in the end?

Level 3
There were 286 students in a school. On the school anniversary, ⁵₆ of the girls and ⁴₅ of the boys came in green caps. The rest came in yellow caps. The number of boys who wore yellow caps was four times of the girls who wore yellow caps. How many students were in green caps that day?

Level
Box A and Box B are identical. ⁷₈ of Box A and ³₅ of Box B are filled with sand. The mass of Box B with its contents is ⁷₉ the mass of Box A with its contents. The total mass of the two boxes with their contents is 528 kg. Find the mass of an empty box.

Level 3
Zoe, Fanny, Eric and Olivia shared some pens. Zoe and Fanny took ¹₅ of the total number of pens while Eric and Olivia took the rest. Fanny had four times as many pens as Zoe and Olivia had 176 pens. Given that Eric had four times as many pens as Fanny, how many pens were there altogether?

Level 3
At a carnival, the children were put into two groups. ⁴₅ of Group F were boys and ²₃ of Group G were girls. Group G had twice as many children as Group F. There were 18 fewer boys in Group F than Group G.

1. What fraction of the total number of children at the carnival were boys? Give your answer in the simplest form.
2. What was the total number of children at the carnival?