4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Which tank will fill first?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?