So well done to all those who had a go at my little puzzle.
Firstly I asked how many miles to the nearest mile is 6km equivalent to?
6km = 3.75miles - so 4 miles!
How many vehicles did I see? I saw 56 - Let's all give Amelia a round of applause - she guessed 60! Come on everyone I want to see you giving a round of applause!