If you say my name, I will no longer exist. What am I?

What runs around the whole yard without moving?

What has 13 hearts but no other organs?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Decode this picture on T-Shirt and tell what it says ?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?