There are 120 students waiting to go on field trip. The students are numbered 1 to 120, all even numbered students go on bus1, those divisible by 5 go on bus2 and those whose numbers are divisible by 7 go on bus3. How many students did not get in any bus?
Note that every tenth student i.e. in all
As every fifth student goes in
Now those divisible by
Students left are