Question

A total of students were transferred to one of the scientific trips by a group of buses and distributed equally
On the way, four of them were disrupted and their passengers were distributed evenly over the remaining buses
After a period of disrupted 3 buses and also distributed passengers equally on the remaining buses
On the way back, two buses were disrupted and passengers were taken to the remaining buses.
Before they arrived, a bus was disrupted, and here, too, its passengers were distributed to other buses

Now every bus has 105 passengers.
What is required to know the number of students and the number of buses before departure?

Answer 1

not sure but buses are 5 and student 525

Answer 2

Buses (14), Students (420)