+2 votes
in Class 12 by kratos

A water tank has steps inside it. A monkey is sitting on the topmost step (i.e., the first step). The water level is at the nineth step.

After drinking water, he wants to go back. For this, he jumps 4 steps up and then jumps back 2 steps down in every move. In how many jumps will he reach back the top step ?

1 Answer

+5 votes
by kratos
 
Best answer

Initial position = 9th step.

Final position = 1st step

Monkey Jumps up = 4 steps

Monkey Jumps down = 2 steps

First Jump = 9 – 4 = 5th step
Second Jumb = 5 + 2 = 7th step
Third Jump = 7 – 4 = 3th step
Fourth Jump = 3 + 2 = 5th step
Fifth Jump = 5 – 4 = 1st step
∴ Monkey took 5 Jumps to reach back

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