Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

How can you tell a raw egg from a hard-boiled egg?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?