Easy
What comes once in a minute, twice in a moment, but never in a thousand years?
The letter: "M"
When you need me, You throw me away. But when you are done with me, You bring me back. What am I?
An anchor
Credit: https://www.smartbrainpuzzles.com/blog/riddles-with-answers/
What has 13 hearts but no other organs?
A deck of cards
I am something people love or hate. I change people’s appearances and thoughts. If a person takes care of themself I will go up even higher. To some people, I will fool them. To others, I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will never go down. What am I?
Only one color, but not one size, stuck at the bottom, yet easily flies. What am I?
A shadow
Credit: https://www.smartbrainpuzzles.com/blog/riddles-with-answers/
What disappears as soon as you say its name?
Silence
I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?
A map
Credit: 27 Hard Riddles to Test Your Smarts with Answers | Reader's Digest
I have keys, but no locks. I have space but no rooms. You can enter, but you can’t go outside. What am I?
What thrives when you feed it but dies when you water it?
What's lighter than a feather but impossible to hold for much more than a few minutes?
You measure my life in hours and I serve you by expiring. I’m quick when I’m thin and slow when I’m fat. The wind is my enemy.
A candle.
What English word has three consecutive double letters?
Bookkeeper
What can you catch, but not throw?
A man was driving his truck. His lights weren’t on. The moon was not out. There were no streetlights. Up ahead, a woman was crossing the street. Luckily, the truck driver stopped in time—how did he see her?
Daytime
Credit: https://www.rd.com/article/short-riddles/#short-hard-riddles
What has branches, but no fruit, trunk, or leaves?