Billy chooses three dfferent non-zero digits and makes six different 3-digit numbers with no digit repeated in any number. He notices that one of the 3-digit nubers N say is the aerage of the other five. Find all possible values of N.

Answer 1

Three different non-zero digits: a, b, c

Hint: How many different 3-digit numbers can you make with only a, b, and c?

Answer 2

pls hepl me

Answer 3

6
that is 3 factorial
a b c
a c b
b a c
b c a
c a b
c b a