Level 3
Min and Tina had an equal number of candies. After Min bought another 20 candies and Tina bought another 6 candies, Min had thrice as many candies as Tina. Find the number of candies each of them had at first.
Level 2
A bus with some passenger left a bus interchange and headed towards its first stop. At the first stop, 6 passengers got onto the bus and no passengers got off from it. At the second stop, 15 passengers got off from the bus and no passengers got onto it. There were 29 passengers in the bus after it left the second stop. Find the number of passengers in the bus when it left the bus interchange.
Level 3
Some passengers boarded the van at the interchange. At the first stop, 3 passengers alighted and 5 passengers boarded the van. At the second stop, 2 passengers alighted and another 4 passengers boarded the van. In the end, there were 10 passengers on the van. How many passengers boarded the van at the interchange at first?
Level 3
Jake started with some balls at the beginning of a game. At the end of the first round of the game, he lost 5 balls to his friend Bill but won 7 balls from his friend Eric. At the end of the second round, he lost 5 balls to Eric but won 6 balls from Bill. In the end, Jake had 20 balls. How many balls did Jake have at first before the start of the game?
