The next competition is on July 28. I have sent home a set of practice questions to help prepare the students for the next competition. These questions are designed for a 'guess, check and refine' strategy - this involves making a reasonable guess of the answer, and checking it against the conditions of the problem and refine the reasonable guess. An incorrect guess may provide more information that may lead to the answer.

These are the answers:

A 6      B 4     C Olive     D 15     E 3