Can you find out the remainder when 3^300 is divided by 5?

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

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Rearrange the letters in "new door" to make one word.

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

You bought me for dinner but never eat me. What am I?

Keyboard words are not in alphabetical order, Why?