A problem!!

I want to make a break in the story "the locked room". Here I offer you a problem:

"Luis is thinking in three consecutive numbers. These numbers make a total of 27. What numbers are they?"

Consecutive numbers: números consecutivos (esto es, números que van uno tras de otro, como 1, 2, 3  ó 5, 6 ó 7)

Make a total of: Suman un total de