I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What is the coolest letter in the alphabet?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

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

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

What have one eye but still cannot see?