exam Maths Puzzle Numerical Ability

One printer can print the paychecks for the employees of a company in 54 min. A second printer can print the checks in 81 min. How long would it take to print the checks with both printers operating?

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exam Other Question

Lane invested $10,000, part at 15% and part at 14%.
If the total interest at the end of the year is $1,430,
how much did she invest at 15%? A group of students are on a tour. The total fare is $120 and this is to be shared equally among the students. If two more students join the tour, each will pay two dollars less. Find the original number of students in the group.