Osbert bought 73 books and 68 toys from the market. If the price of each book and toy is Rp 63 and Rp 40 respectively, how much money did Osbert pay for the books?

There were 5156 students in a school last year. This year 285 students joined kindergarten and 355 students passed out and joined college. Also, 368 students were transferred to other schools, and 382 students were transferred from other schools. How many students are there in the school now?

The students of class 1 have been given an assignment to pack 90 candies in boxes, each having 18 candies. How many boxes are made after the completion of the assignment?

Ariel, Putri and Nurul are practicing for the school races. Ariel is the youngest, and can run a lap in 132 seconds. Putri can run a lap in 36 seconds. The oldest student, Nurul can run a lap in 24 seconds. They start running at the same time from the starting line. After how many seconds will they all meet at the starting line?