A frog fell into a hole
A frog fell into a hole meters deep.
Every day the frog climbs meters but falls meters down when it is asleep in the evening.
How many days does the frog need to get out of the hole?
Note: When the frog reaches the top , it will get out of the hole immediately.
The answer is 28.
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1 solution
In the 2 8 th day , the frog will reach the top of the hole during the day , so it will not sleep in the hole at the evening.