Good Riddles

 

Question: There are 30 cows in a field and 28 chickens....how many didn't?

Question: You wait for it. It cracks, stays for a moment, and then vanishes before your eyes. What is it?

Riddle #144 (medium)

Question: If 1/2 of 5 is 3, then what is 1/3 of 10?

Riddle #198 (medium)

Question: John has been hired to paint the numbers 1 through 100 on 100 apartments.

How many times with he have to paint 8?

Riddle #456 (medium)

Question: I am a big threat to humanity,
but you wouldn't get rid of me even if you could.

What am I?