I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Forwards I am heavy, backward I am not. What am I?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135