Logical Puzzle : Dinki breaks its piggy bank puzzle
This puzzle is more famous in below format
Dinki breaks its piggy bank and found
71 rupees in form of 20-paisa and 25-paisa.
There was total of 324 coins in his piggy bank.
Can you tell me how many number of 20-paisa and 25-paisa he got?
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Answer of the puzzle Can you tell now how many 20 and 25 paise she got? is : 200 and 124
Lets say x is the count of 20 paisa and y is the count of 25 paisa so
x + y = 324
that also means x = 324 – y
we know that value of x is 20 paisa and y is 25 paisa so
20 . x + 25 . y = 7100
now replace the x (324 – y)
20 . (324 – y) + 25 y = 7100
6480 – 20y + 25y = 7100
5y = 7100 – 6480
5y = 620
y = 124
so x = 324 – 124 = 200
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