Question

I am planning to tile my floor. Each tile is square and has a design which is a 3x3 grid of
squares. I want to use a combination of 4 different types of tile and when I have finished I want
to have used the same number of each tile. I also want the proportion of squares of each colour
to be equal.

Which one of the following 5 tiles should I not choose?

The link to the questions is:
http://www.admissionstestingservice.org/images/20356-past-paper-2010-section-1.pdf

Urgent help needed thanks.

Answer 1

i need help on this question too!