There are three people in john's family. the range of their shoe sizes is 4. two people in the family wear shoe size 6. john's shoe size is not 6 and it is not 10. what is john's shoe size?

X - John's shoe size

Two people in the family wear shoe size 6, but John's shoe size is not 6.
The shoe sizes in the family:
6, 6, x

The range is the difference between the highest and the lowest value. The range is 4.
There are two possibilities:

1. John's shoe size is the biggest:

However, his shoe size is not 10, so it's impossible.

2. John's shoe size is the smallest.


John's shoe size is 2.