Quizzes & Puzzles6 mins ago
Bats And Balls
A bat and a ball cost £1.10 in total. The bat costs £1 more than the ball. How much does the ball cost ?
Answers
I think elliemay's at 11.23 is an elegant explanation. Thank you all though.
I took it from a review of a book on philosophy. Such a question seems to be attached to 'dual-process theory'.
'Such theories are well placed to explain simple errors of reasoning, which subjects readily recognise as such once they are pointed out.'
If I can change the car question to make it easier to explain, say the journey one way was thirty mile, travelling at 30 mph would mean it took an hour.
To average 60mph there and back, it would need to travel sixty mile in an hour but it has already taken an hour to travel the first thirty mile of the journey so the desired average is not possible.