I’m tall when I’m young, and I’m short when I’m old. What am I?

I am white when I am dirty, and black when I am clean. What am I?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

81 x 9 = 801. What must you do to make the this equation true?

Before Mount Everest was discovered, what was the highest mountain in the world?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

What is the next number in this matchsticks series riddle?