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.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What is the riddle which can be asked all day with a different correct answer each time.

What is the Surname of Barbie Doll?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What word is pronounced the same if you take away four of its five letters?

Can you count the number of squares in the given picture?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?