a monkey while trying to reach the top of a pole of height 12 metres takes every time a jump of 2 metres but slips 1 metre while holding the pole.The number of jumps required to reach the top of pole is : *if possible solve this question with a formula or proper algorithm*

Length of each jump = Initial Jump(2 metres) - Length that he slips(1 metres) = 1 metre.
This means monkey will reach at top after 12 jumps.  But NO!! This is not the case here.
Basically,
At 1st jump,monkey is at 1 meter.
.
.
.
At 10th jump, monkey is at 10 meters.
After 10th jump, mokey will make a jump of 2 meters through which he will reach at a height of 10+2 = 12 meters.
Therefore, correct answer is 11. At 11th jump he will reach at the top of pole.
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