Level 3
Fill in the blanks.
Adam has thrice as many stickers as Chris.
Adam gives 10 to Bryan.
Chris receives 10 from Bryan.
In the end, Adam has twice as many stickers as Chris.
Change in the number of stickers that Chris has = _____ u
Difference in the number of stickers Adam and Chris have in the end = _____ u
Level 1 PSLE The ratio of the number of vests to that of skirts in a shopping centre was 3 : 2 at first. After 30 skirts were sold, the ratio of the number of vests to that of skirts became 4 : 1. What was the total number of vests and skirts in the shopping centre at first?