self Maths Puzzle

A set has exactly five consecutive positive integers starting with 1. What is the percentage decrease in the average of the numbers when the greatest one of the numbers is removed from the set?

Read Solution (Total 1)

1+2+3+4+5/5 =3
and 1+2+3+4/4 =2.5
so, {(3-2.5)/3}100 =16.66
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self Other Question

In a meet, persons from five different places have assembled in Bangalore High School. From the five places the persons come to represent are 42,60,210,90 and 84. What is the minimum number of rooms that would be required to accommodate so that each room has the same number of occupants and occupants are all from the same places?
A lady buys goods worth $200 from a shop. (shopkeeper selling the goods with zero profit).
The lady gives the shopkeeper a $1000 note.
The shopkeeper gets some change from the shop next door and keeps $200 for himself and returns $800 to the lady.
Later the shopkeeper of the next shop comes with the $1000 note saying "fake" and takes his money back.
How much LOSS did the shopkeeper face?