What has to be broken before you can use it?

What is the Surname of Barbie Doll?

Can You Find the Missing Zero? A Number Puzzle that Will Trick Your Eyes

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

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.

Too much grey makes things difficult. However, your task here is to find the elephant hidden in the picture.

The UN Security Council has how many member states?

a) 15
b) 10
c) 20
d) 25

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.