What always comes into a house through the keyhole?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

They are three errirs in this question. Can you find them?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

What is always in front of you but can’t be seen?