For a number game, a teacher writes the first ten prime numbers on the board and asks the class for their middle value. What is the median of these ten primes?

Explanation

1. 01

   The first ten primes are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 (1 is not prime).

2. 02

   The median is the average of the 5th and 6th: $\frac{11 + 13}{2} = 12$.