9. Given that $n$ is an odd integer less than 1000 and the product of all its digits is 252 . How many such integers are there ?
(A) 3 ;
(B) 4 ;
(C) 5 ;
(D) 6;
(E) 7 .
9. Ans: (C)
$252=2 \times 2 \times 3 \times 3 \times 7$. We can have: $667,497,479,947,749$.