Tricky one !!

Number Theory Level 2

A monkey tries to climb a 60 ft high pole. The pole is slippery due to grease and the monkey climbs 3 ft but slips back 2 ft every minute. How much time will the monkey take to reach the top?

60 minutes 58 minutes 57 minutes 20 minutes

Kanika Kachhwaha by Kanika Kachhwaha , 20, India

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1 solution

Kanika Kachhwaha
Jun 7, 2014

Each minute, the monkey moves up 3 ft and slips back 2 ft, thus covering 1 ft in a minute.

Hence, in 57 minutes, the monkey will climb 57 ft. In the next minute, i.e., the 58th minute, it will climb the remaining 3 ft, thereby reaching the top.

The correct answer is 58 min.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

How can you tell that this process of climbing 3 feet and slipping two feet takes place in one minute when nothing about monkey"s speed is mentioned in the question?????The question seems incomplete to me.......

DEBABRATA MUKHERJEE - 6 years, 10 months ago

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" The pole is slippery due to grease and the monkey climbs 3 ft but slips back 2 ft every minute. " Jst read the last words i.e. The monkey is climbing 3 ft and is slipping back 2 ft every minute. Now I must hope from you that you might have understand your query.

Kanika Kachhwaha - 6 years, 8 months ago

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