11×1=11
11×2=22
11×3=33
11×4=44
11×5=55
11×6=66
11×7=77
11×8=88
11×9=99
11×10=110
The smallest 3-digit number is 100. So, the multiples that are less than 100 in the above table need to be selected.
So, there are 9 multiples of 11, which are less than 100.