Game: Who am I?

What are the mystery numbers?  All numbers are less than 50. a).   I am divisible by 10 and 4 but not divisible by 8. b).   I am divisible by 11, and if you divide me by 5, I leave a remainder of 3. c).   I am divisible by 5 and 3, and leave a remainder of 1 if divided by 2.

Answer:
a). 20, 40
b). 33
c). 15, 45