When I have one O, you need me to live. If you have me with two Os, I’ll kill you. What am I? - Riddlecafe

Please disable your adblocker! (:

4

When I have one O, you need me to live. If you have me with two Os, I’ll kill you. What am I?

View Answer

H2O is water (H2O2 is hydrogen peroxide, quite deadly.)

Did you know the answer?

Trending Riddle

challenging
A blacksmith has many apprentices working for him, and as a reoccurring game, every so week one of them succeeds at forging a key to let loose his pet monkey. The monkey goes wild, throwing stuff and breaking things until the blacksmith finally recages him and puts on a different lock. The ordeal has become costly. The blacksmith scolds the apprintices and makes them do the monkey catching, and puts them to extra work. The apprentices do find the extra work bothersome, yet they continue to pick the locks, releasing the monkey. The blacksmith is at his wit's end. He makes more and more complex locks, but everytime, one of his apprentices succeeds in solving it. The blacksmith asks for your advice. What should he do? He doesn't want to sell his pet monkey, nor does he have another place for it to stay.
normal
An ant is richer than a dragon, A wolf is poorer than a bee, A man’s no different from a monkey, But all are above me!
easy
Look at one and you’ll see three but, there’s twenty six of me. What am I?

Riddle Difficulties