The Best Engine is a magazine story.
Thomas thinks that having the number 1 makes him the best engine on the railway, but Gordon argues that, as he's number 4, he's better than Thomas. James replies that, as one plus four makes five, he is better than Gordon and Thomas. Douglas butts in and counters that, as one plus four plus five makes ten, he is better than Thomas, Gordon and James. At last the Fat Controller settles the dispute by reminding all five engines that their numbers do not matter, but being Really Useful does.