Level 3
Betty spent ⁴₅ of her money on 14 stamps and 5 pens. The cost of each pen is 2 times the cost of each stamp. She bought some more stamps with ²₃ of her remaining money. How many stamps did Betty buy altogether?

Level 3
John spent ³₇ of his salary and gave $880 to his wife. Of the remaining amount, he saved ¹₅ of it and gave ³₁₀ of it to his parents. He then donated ²₃ of what he had left away and gave the remaining $56 to his daughter. What was John's salary?

Level 3
Cathy's shop sold bracelets and rings. The bracelets were sold at $100 each and each ring was sold at ⁴₅ of the price of each bracelet. Cathy sold ¹₄ of the items on the first day and collected $15580. ³₄ of the items sold on the first day were bracelets.

1. How many rings were sold on the first day?
2. What was the total number of items left after the first day?

Level 3
Kate had some fruits at her stall. ³₄ of them were mangosteens, ¹₃ of the remainder were apples and the rest were coconuts. The amounts earned for each mangosteen, each Fuji apple and each coconut sold are $1.50, $3.00 and $4.50 respectively.

The number of mangosteens sold to the number of apples sold to the number of coconuts sold was 3 : 5 : 3. In total, she sold ¹₄ of the fruits and earned $198. How many coconuts did she have at first?

Level 3
20% of the people are performers for a concert and the rest are spectators. 80% of the spectators are adults and there are 3900 more adults spectators than children spectators. How many adult spectators must leave so that 25% of the people in the concert are adult spectators?