by Des MacHale
Using A4 sheets of card, I have made rectangles with dimensions in centimetres of 1 x 2, 2 x 3, 3 x 4 and so on up to a maximum size. I needed more than one A4 sheet to do this.
My family managed to lay out all these rectangles with no gaps or overlaps to form a larger rectangle that also had sides that differed by one centimtre.
How many rectangles did I make?