A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What can go through glass without breaking it?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

What number when divided in half becomes zero?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Why is a river so rich ?

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"