Level 3
Jerry bought 4 packets of biscuits. Katrine bought 2 times as many packets of biscuits as Jerry. If each packet costs $8, how much did Katrine spend on the biscuits?
Level 3
There are 624 stamps in a bag. Given that there are four times as many yellow stamps as red stamps and twice as many white stamps as yellow stamps, how many stamps in the bag are yellow?
Level 3
Three boys collected 220 stamps altogether. Jake collected 4 times as many stamps as Ken. Ben collected 35 stamps. How many stamps did Ken collect?
Level 3
There were twice as many children as boys and thrice as many girls as boys at a carnival. Given that there were a total of 360 children at the carnival, how many girls were at the carnival?