What does this rebus riddle means ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

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

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

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"

Can you solve the photo plexer logic ?

What is the word or phrase?

What always comes into a house through the keyhole?