Common Sense Please!
Algebra
Level
2
a monkey is in the bottom of a 30 feet well. Each day he climbs 3 feet and slides 2 feet. On what day does the monkey reaches the well?
The answer is 28.
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Day 1=3ft Night 1=1ft Day 2=4 ft Night 2= 2 ft. From this observation, the days are going in a arithmetic progression with the difference of 1.
So 30=3+(n-1)1 and n is 28.