Question

double my tens digit to get my ones digit. double me and i am less than 50? who am i

Answer 1

12 or 24.
I think

Answer 2

"double my tens digit to get my ones digit"
only possible choices:
12,24,36,48,

double those:
24,48,72,96

which in the first list are less than 50 ?

so Ana was right.