Question

Nidhi saves Rs. 2 on first day of the month, Rs. 4 on second day, Rs. 6 on third day and so on. What will be her saving in the month of Feb. 2011?

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Answer 1

Answer:

no of days in Feb 2011 =28

Nidhi saves on 1st day = rs. 2

2nd day =rs.4

3rd day =rs. 6

& so on.

her saving =2+4+6+..........+56

=28×(28+1)

=28×29=812

I hope it will help you.