The “Man Fell in Well” puzzle is a classic riddle that goes like this:

After falling into a well that is 30 meters deep, a man can climb up 4 meters during the day but slips back down 3 meters. What is the number of days required for him to climb out of the well?

**Man Fell in Well Puzzle solution **

To calculate the number of days required for the man to climb out of the well, we need to determine how many meters he will have to climb in total.

- Determine the man’s daily progress: He climbs up 4 meters but slips back down 3 meters, resulting in a net progress of 1 meter per day.
- Calculate the number of days required: The well is 30 meters deep, and the man’s net progress each day is 1 meter. Therefore, he will need to make 29 meters of progress to climb out of the well (30 meters depth – 1-meter progress made each day = 29 meters remaining). Since he makes 1 meter of progress per day, he will need 29 days to climb out of the well.
- Re-calculate the number of days required: However, we must consider that on the 27th day, the man will climb 4 meters, which will bring his total climb to 30 meters. Therefore, it will take 27 days for the man to climb out of the well.
- Determine the man’s maximum height: On the first day, the man can climb up to a maximum height of 4 meters. On the second day, he can climb up to a maximum height of 5 meters. On the Nth day, his maximum height will be N+3 meters.
- Find the value of N: To reach a height of 30 meters, N must be 27. Therefore, on the 27th day, the man will climb up to a height of 31 meters, which will allow him to escape from the well.