What is the difference between a jeweller and a jailer?

Different lights make me strange by changing me into different sizes. What am I?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

What is full of holes but still holds water?

What does below chemistry rebus means?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

Can you find out which number multiplied by itself will give the output as 12345678987654321?