Lets create a repository of formulas/shorcuts.
Let me inaugurate with this blessing related to Time,Speed and Distance
When objects are starting simultaneously from a point on a circular track with speeds being 'n' times that of the first object :
speed of object 1 = x
object 3= 3x....and so on
then they meet at exactly m-1 points at intervals of 1/(m-1) *total distance