Level 3
Mark had thrice as much money as Paul. After Mark had spent $60, Paul had twice as much money as Mark. How much more money than Paul had Mark at first?
Level 3
A baby elephant weighs 85 kg. A young elephant is twice as heavy as a baby elephant. An adult elephant is thrice as heavy as a young elephant. Find the mass of the adult elephant.
Level 3
Dennis had 120 marbles more than Jean at first. After Dennis had given away 150 of his marbles to Calvin, Jean had thrice as many marbles as Dennis. Find the number of marbles Dennis had at first.
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
Daniel had 4 times as much money as Erwin. After Erwin's father gave him $21, the amount of money Daniel had become $3 less than that of Erwin's. How much did Erwin have in the end?
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?
