Level 3
Betty spent $37.80 on an equal number of spoons and plates. If 5 spoons cost $7.20 more than 2 plates while 1 spoon cost as much as 2 plates, how many spoons and plates did she buy?
Level 3
The total cost of 5 suits and 5 hoodies was $285. Tina bought 7 such suits, 5 such hoodies and a cardigan for $543. If the total cost of a cardigan and a suit was $150, find the difference in cost between the suit and the cardigan.
Level 3
When Mrs Yang was 45 years old, her son was 2 times her daughter's age. Mrs Yang would be twice her son's age when her daughter was 30 years old. How old would Mrs Yang be when her daughter was 18 years old?
Level 3
Rael and Ken had $229 and $193 respectively. Each of them bought a hoodie and a T-shirt at the same price. The cost of the hoodie was 3 times as much as the T-shirt. In the end, Rael had 5 times as much money as Ken. What was the difference between the cost of the T-shirt and the hoodie?
Level 3
Oscar is 3 times as old as his brother. In 14 years' time, Oscar will be 10 years less than twice of his brother's age. How old was Oscar 2 years ago?
