Question 248342
let x=number
100a+10b+c=x
I am a three-digit number.
I am less than 200.
This tells me that the digit for hundreds is 1
It is a three digit number less than 200
Three digits numbers start with 100
so a=1

I am divisible by 12, and by 9.
divisible by 12
108, 120, 132, 144, 156,168,180,192

My units digit is less than my tens digit.

120, 132,180 and 192
divisible by 9
180