Find the hidden tiger in the given optical illusion ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

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

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

You can see it everyday, But cannot touch it at will. What is it?

What does this Rebus Picture mean?