|Level:||Primary 5 CA1|
|Subject:||Mathematics Paper 2|
|Degree of Difficulty:||AAA|
|Type of paper:||Word Problem Q10 Solution|
10. At Train Stop A, a train carrying some passengers left the station. When it reached Train Stop B, half of the passengers alighted the train. At Train Stop C, 10 passengers boarded the bus and 8 passengers alighted the bus. When the train finally reached Train Stop D, 5 passengers alighted the bus. When the train left Train Stop D, 21 passengers were still on the train. Find the number of passengers on the train when it left Train Stop A?