Respuesta :

is the answer..

3, 6, 9, 12, 15, 18, 21, 24, 27, 30 ?
1- 1
2- 2
3- 10
4- 11
5- 12
6- 20
7- 21
8- 22
9- 100
10- 101
RELAXING NOICE
Relax