Question: Asher is a teacher. Asher instructs every student in the class to sketch one roman number as per their roll numbers. Student with roll number 1 will sketch the first roman letter, roll number 2 will sketch the second roman letter and so on. Finally, Asher collects all sketches and found that there are 5 sketches of each of roman letters. How many students were there in the class?
Answer: 35