Help please i really need help on this.

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²