I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What can go up a chimney down, but can’t go down a chimney up?

Prove that twice of ten is the same as twice of eleven.

Can you place three balls such that the equation shown in the picture holds true?

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 ?

Can you find a rabbit in the given picture?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What is full of holes but still holds water?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?