I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
echo
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. What am I?
What is a candle?
Three different doctors said that Paul is their brother yet Paul claims he has no brothers. Who is lying?
Who is none of them? (They're all is sisters.)
Credits: https://icebreakerideas.com/hard-riddles/#The_Toughest_Riddles_to_Test_Critical_Thinking_Skills
What disappears as soon as you say its name?
silence"
When you need me, You throw me away. But when you are done with me, You bring me back. What am I?
What is an anchor?
You go at red and stop at green. What am I?
What is a watermelon?
Credit: https://www.rd.com/article/short-riddles/#short-%e2%80%9cwhat-am-i%e2%80%9d-riddles
Wednesday, Bill and Jim went to a restaurant. They ordered and ate their food. Then they paid the bill, but neither Bill nor Jim paid. Who did?
Who is Wednesday?
Credit: https://www.rd.com/article/short-riddles/#short-hard-riddles
What has 13 hearts but no other organs?
What is a deck of cards?
Credit: https://www.smartbrainpuzzles.com/blog/riddles-with-answers/
What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?
What is the letter: "R"?