There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

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

Which is the rope you never skip with?

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

Do you know what I am?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Who always enjoys poor health?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

What time is it when an elephant sits on a fence?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Which number should replace the question mark?