Question: 34
Kanika was given her pocket money on Jan 1
st
, 2008.
She puts Re 1 on Day 1, Rs 2 on Day 2, Rs 3 on Day
3, and continued doing so till the end of the month,
from this money into her piggy bank. She also spent
Rs 204 of her pocket money, and found that at the
end of the month she still had Rs 100 with her. How
much was her pocket money for the month?
Solution:
Let Rs
be the pocket money for the month.
The money she deposited in piggy bank and spent
Money put in piggy bank from
Jan to Jan1 31 1 2 3 4. . .... 31
Now,
Now, the sum of
terms.
31
31
2 1 31 2 1
2
S