If it took eight men ten hours to build a wall, how long would it take four men to build it?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

Prove that the below maths equation is true.

8 + 8 = 91

what does this below rebus represent identXQQQQQME

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?