Level 3
The length of Table X is twice that of Table Y. The length of Table Y is thrice that of Table Z. Find the length of Table X if Table Z is 146 cm long.
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
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
A farmer had twice as many chickens as ducks. After he had sold 200 chickens, he had thrice as many ducks as chickens. How many chickens did he have at first?