Did you fly off on a holiday this year? Several people flew their solutions to NRICH and there was quite a variation amongst them.

However, there were 3 groups of people: Anita and Jing-Jing from Kilvington Girls' Grammar School in Australia; Rodrigo and Thomas, from St Mary's School in Lancashire and Mithran, who is also from Australia, that arrived at the same answer: 50 minutes for the journey south-east.

To help them solve the problem Rodrigo and Thomas used grid paper and connected lines. Mithran must have done the same, because Mithran says that the lines formed a parallelogram.