Middle of the Pack

Matt is the fiftieth fastest and the fiftieth slowest runner in his school.
Assuming no two runners are the same speed, how many runners are in Matt’s school?

Answer: 99 runners.

Explanation:
If Matt is the 50th fastest, there are 49 runners faster than him.
If he’s also the 50th slowest, there are 49 runners slower than him.
Adding them together: 49 + 1 ( 𝑀 𝑎 𝑡 𝑡 ) + 49 = 99