An old priest fell on a bottom of the well of a church.
The well is 20 inches deep.
At day time, the old priest climbs 5-inches but when at dark he slip back 4 inches.
In how many days priest will come out of the well ?  Choose the correct choice from the following answers
A) 15-days
B) 16-days
C) 17-days
D) 18-days
E) 19-days
Solution:   16-days   In 15-days, he will climb 15-inch and when he climbs 5 inch more, he will be out of the well   Answer 16-days
<result>B</result>
An old priest fell on a bottom of the well of a church.
The well is 20 inches deep.
At day time, the old priest climbs 5-inches but when at dark he slip back 4 inches.
In how many days priest will come out of the well ?