I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Can you solve below mathematical equation?

2^1234 - 2^1233

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What do you call a fish without an eye?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

What jumps when it walks and sits when it stands?