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Question

In the year 2013, Pravin saves Rs. 1 on the first day, Rs. 3 on the second day, Rs. 5 on the third day and so on. Find the total amount of his saving in that year.

A
Rs. 133225
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B
Rs. 132225
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C
Rs. 123225
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D
Rs. 134225
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Solution

The correct option is A Rs. 133225
Pravin saves Rs. 1 on first day, Rs. 3 on second day, Rs. 5 on third day and so on.
There are total 365 days in the year 2013.
Saving of first day =1=2×11
Second day =3=2×21
Third day =5=2×31 .........................
Saving for last day(365th day) =2×3651.
Total saving amount =1+3+5+7+....................+(2×3651)
=1+3+5+7+..................+(2n1)=n2
=3652=133225.
Hence, the total saving is Rs. 133225.

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