Level 3
Mrs Lin bought 5 kg of shrimp and 2 kg of beef for $96. If she brought 2 kg of shrimp and 5 kg of beef, she would have to pay $3 less. How much did 1 kg of shrimp cost?
Level 3
There are 151 marbles in a big basket and a small basket altogether. The total number of marbles in 3 big baskets and 8 small baskets is 568. How many more marbles are there in a big basket than a small basket?
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
For every good jacket that Mr Zhang sold, he earned $19. He sold defective jackets at a discount, which would cause him to lose $6 per defective jacket. In July, for every 27 jackets sold, 7 were defective. Mr Zhang earned $3042 from the jackets sold.
How many less jackets sold were defective than good?
How much less money did he earn because of the defective jackets?
Level 3
Henry's freight forwarding company charges $17 for every mirror delivered on time and $10 for every mirror delivered late. In the month of August, Henry freight forwarding company collected $2200. For every 17 mirrors delivered, 15 were delivered on time and 2 were delivered late.
What was the total number of mirrors delivered on time?
How much less money did Henry freight forwarding company collect in August due to the late delivery of the mirrors?
