其它
Ken, Tom and Keven were playing a game together. At $1$ P.M., Ken got a score of $-75$, Tom got a score of $-32$, and Keven got a score of $3$. Half an hour later, Ken\textquotesingle s score was $-1$, Tom\textquotesingle s score was $41$, and Keven\textquotesingle s score was $-62$. Who had the greatest change of score? 
Overseas Competition->Knowledge Point->Combinatorics->Mathematical Thoughts
The changes of Ken\textquotesingle s, Tom\textquotesingle s and Keven\textquotesingle s scores were $74$, $73$ and $65$, respectively. Ken had the greatest change. 