What is the Surname of Barbie Doll?

If an electric train is travelling south, then which way is the smoke going?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

The answer I give is yes, but what I mean is no. What was the question?

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

What is the next number in this matchsticks series riddle?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

What does this mean?

CCCCCCC

What month of the year has 28 days?