John is the son of Jacob.
So,
Jacob is the_____of John's father?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Why Aeroplane windows are round?

I am quite hot but become too cold if you remove the first two letters. What am I?

What Deficiency does the below rebus represent?

VIT_MIN

By using 'because' continuously three times, can you make an English statement ?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

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

What jumps when it walks and sits when it stands?