9. For a two-digit number $x$, 6 statements are made:

a) $x$ is divisible by 3; b) $x$ is divisible by 5;

c) $x$ is divisible by 9; d) $x$ is divisible by 15;

e) $x$ is divisible by 25; f) $x$ is divisible by 45.

Find all such $x$ for which exactly three of these statements are true.
9. Note that $x$ cannot be divisible only by a power of 3, or only by a power of 5 - in each of these cases, only two statements would be true. Therefore, $x$ is divisible by 15. Further, $x$ is not divisible by $5^{2}$ (or by $3^{2}$) - otherwise, at least 4 statements would be true. Therefore, the condition of the problem is satisfied by two-digit numbers that are divisible by 15, but not by 25 and 9. Answer: $15 ; 30 ; 60$.