The diagram shows a cyclic quadrilateral PQRS with its diagonals intersecting at K. Which of the following triangles is similar to triangle QKR?

In the diagram, PO and OR are radii, |PQ| = |QR| and reflex < PQR is 240^o. Calculate the value x

Find the size of the angle marked x in the diagram.

The histogram shows the age distribution of members of a club. How many members are in the club?

The histogram shows the age distribution of members of a club. What is their modal age?