What month of the year has 28 days?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Prove that twice of ten is the same as twice of eleven.

What have one eye but still cannot see?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find the company name in the pictogram below?

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?

If eleven plus two equals one, what does nine plus five equal?