Arithmetic - Quant/Math -
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Question 4 the day: September 20, 2002
The question for the day is from the topic of Arithmetic.

The classic problem of a monkey and the greased flag pole . The height of a certain flag pole is 30 feet. Grease is applied to the pole. A monkey attempts to climb the pole. It climbs 3 feet every second but slips down 2 ft in the next second. When will the monkey reach the top of the flag pole?

(1)

56 secs

(2)

27 secs

(3)

60 secs

(4)

55 secs

Solution:

Every two seconds the monkey gains 1 ft. Climbs 3 feet in 1st second and slips 2 feet in the next.

However, when it has reached 27ft, in the next jump (3ft upwards) it will reach the top.

It will take 27*2 = 54 seconds to reach 27ft & then 1 sec to reach the top. Hence 55 seconds.