Verified answer

14

there are 5 one digit odd no.

Given this we get 5+4+3+2+1 ans & thats 15.

But 1*9 = 9 = 3*3

So ans is 15-1=14

The single one digit odd numbers are 3, 5, 7, 9.

So 3 x 3....3x9

5 x 3....5x9

: :

: :

so the answer is 16

000/1