Answer:
106
Step-by-step explanation:
Answer:
11) a or d 12) b
Step-by-step explanation:
sorry, I don't feel like looking at number 11 properly I'm half asleep
If
is a number that is both divisible by 4 and 5, then

4 and 5 are coprime, so we can use the Chinese remainder theorem to solve this system and find that
is a solution to the system, where
is any integer. Simply put, any multiple of 20 fits the bill.
Now, there are 11 numbers between 100 and 300 that are divisible by 20 (100, 120, 140, and so on). We have
when
, so the sum we want to compute is
