55. Exemplar exercise problem XVI

Kanika was given her pocket money on Jan \(1\)st, \(2008\). She puts \(₹1\) on Day \(1\), \(₹2\) on Day \(2\), \(₹3\) on Day \(3\), and continued doing so till the end of the month, from this money into her piggy bank. She also spent \(₹204\) of her pocket money, and found that at the end of the month she still had \(₹100\) with her. How much was her pocket money for the month?

 

Kanika's pocket money for the month \(₹\).