Some riddles to make you think again!

Question 1.
If an electric train is travelling south, which way is the smoke going?

Question 2.
You draw a line. Without touching it, how do you make the line longer?

Question 3.
You walk into a room with a match, a karosene lamp, a candle, and a fireplace. Which do you light first?

Question 4.
What starts with the letter “t”, is filled with “t” and ends in “t”?