On a straight line, ten points were placed at equal intervals, and they occupied a segment of length $a$. On another straight line, one hundred points were placed at the same intervals, and they occupied a segment of length $b$. How many times is $b$ greater than $a$?
On a segment of length $a$, 9 intervals fit, and on a segment of length $b-99$. Therefore, $b=11a$.

C

11 times.