There are 2 persons selling mangoes.Both of them have 30
similar mangoes each.The first person sells 2 mangoes for Rs. 1(thereby he can
earn Rs. 15 for himself) and the second person sells 3 mangoes for Rs. 1(thereby
he can earn Rs.10 for himslef).Their total earning will Rs. 25.

Now the
first person had some urgent work for the day and was not able to go to the
market to sell mangoes so he gives his 30 mangoes to the second person asking
him to sell the same at the normal rate at which he sells.

The second person
now has 60 mangoes with him and instead of selling separately as 2 for Rs.1
& 3 for Rs. 1 ..... he sells 5 for Rs. 2. The earning is now only Rs.
24.

How did the earning reduce when the number of mangoes and their selling
rate is same ?

This is a tricky question but a very logical one.Think for sometime...it's all in mathematics.

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Scroll Down for the Answer.

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Answer:

2 for Rs. 1 means 50.00 paisa per mango,

3 for Rs. 1 means
33.33 paisa per mango, and

5 for Rs. 2 means 40.00 paisa per mango

now when the second person is selling at the new rate he is making a profit
of 6.67 paisa on his lot of 30 mangoes but a loss of 10.00 paisa on his friends
lot of 30 mangoes.

Net loss is 3.33 paisa per mango for 30 mangoes which
equals to 100 paisa or Rs. 1

There are many more explanantions that may be available for the riddle.