Level 3
A shopkeeper is selling 700 sketch books. He sold 60% of them at $8 each, 50% of the remainder at a discount of 40% and the rest at cost price. He made a profit of $2912. Find the cost price of a sketch book.
Level 3
In a shop that sells t-shirts, 250 blue t-shirts were sold weekly and 25% of the remaining t-shirts that were sold were red. Of the leftover, 40% of the t-shirts sold were yellow t-shirts and the rest were black t-shirts. Given that the number of black t-shirts sold was 20% of the total number of t-shirts sold, how many red and blue t-shirts were sold altogether?
Level 3
Edward spent $340 on shopping, $650 on transport and gave 60% of the remainder to his wife. He then saved the rest of the money, which amounted to 10% of his original sum of money. How much did he give his wife?
Level 3
Olivia bought 3 home theater systems and 6 toasters. Each home theater system costs $280 more than each toaster. She spent 20% of her money on the toasters.
