Required Mathematical Intelligence

Chapter 15 The Frog at the Bottom of the Well
The well is 27 meters deep.A dragonfrog climbed up from the bottom of a well on the morning of the 1st of a certain month.It can climb 3 meters during the day and fall 2 meters at night.According to this, how many days can climb to the well?

[Answer: If you think that you have to climb 1 meter a day and you need to climb to the well on the 27th, you are making a mistake of taking it for granted. On the day of the 1st, the dragonfrog climbed 1 meter, so the 2nd started to climb from 1 meter, and then pushed back in turn. It can be imagined that the 25th started to climb from 24 meters.Because you can climb 3 meters during the day, you can climb to the top of the well at night, and you won't "slide down". ]
(End of this chapter)