How have scientists known of the existence of living giant squids

单项选择题To answer this question you have to work out a code. On the left are some shapes and the codes that go with them. You must decide how the code letters go with the shapes. Then find the correct code for the test shape from the set of four codes on the right.

单项选择题At the eating contest the winner ate an average of 15 hot dogs at the first 20 sittings. After a further 20 sittings the average increased to 20 hot dogs. What was the average for the last 20 sittings