A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

What can you catch but never throw?

There is something which is always coming but never arrives?

Can you identify the famous TV character from the rebus below?

Bay of Bengal is in which state?

If 21x = 79x, what is the value of x?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?