We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

What is the end of everything?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

What does below rebus means ?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?