Consider that you have numbers from 1 to 50 . And you have 5 column. You need to add numbers to rows. How many rows will u need?

Question

Every rows contain 5 numbers , because we have 5 column. Every rows must be different. (e.g. if first row is 1,24,46,23,9
second row can be 1,24,46,23,8 or 24,13,7,34,1)

Answer 1

50 / 5 = 10
We need 10 rows