Level 2
Lynn had 10 kg of flour. She used ¹₂ of the flour to bake a cake and ¹₄ of the remaining flour to bake some muffins. How much flour did she have left? Give your answer in grams.

Level 2
Hock Ming spent ³₇ of his money on a book and ¹₄ of the remainder on a CD. He had $45 left. How much money did he have at first?

Level 3
Lennie gave ⁵₈ of his salary to his wife. He gave ¹₅ of his salary to his four children and left the rest for himself. He had $420 left for himself. Given that his four children received the same amount each, how much did each of his four children receive?

Level 3
During a survey, some people responded that they preferred badminton to other sports. The ratio of the number of women to the number of men who liked badminton was 3 : 1. The ratio of the number of people who liked badminton to those who disliked it was 3 : 1. If 20% of the people who did not like badminton were women, what was the ratio of the number of men to the number of women chosen for the survey?

Level 3
The ratio of saloon cars to the total number of cars on display in Ken's car shop was 2 : 7. ²₅ of the remaining bikes on display were family cars and the rest were electric cars and sports cars in the ratio of 10 : 3. If there were 16 more electric cars than saloon cars, how many sports cars were there?