JMC 2014 Challenge

The diagram shows a square divided into strips of equal width.

Three strips are black and two are grey.

What fraction of the perimeter of the square is grey?

9**. **Triangles *XYZ *and *PQR *are drawn on a square grid.

What fraction of the area of triangle *XY Z *is the area of triangle *PQR*?

13**. **A rectangle is split into triangles by drawing in its diagonals.

What is the ratio of the area of triangle *P *to the area of triangle *Q*?

14.** **Which of these is equal to one million millimetres?

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