I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Can you solve the below geography rebus by decoding the below rebus ?

How many times in a given day, minutes and hour clock comes in a straight line ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What jumps when it walks and sits when it stands?

Solve below rebus puzzle?

What will you call your mother's brother's brother-in-law?

What am I?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?