What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Next Number in the Series,

5, 16, 49, 104, ?

Which digit occurred maximum times between the number 1 and 1000?

The more you take me, the more you leave me behind.
Who Am I?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.