A businessman earns an income of PKR 1 on the first day of his business. On every subsequent day, he earns an income which is just double of that made on the previous day. On the 10th day of business, his income in PKR is ______?

Answer: 2⁹
Explanation

Income on the first day = Re. 1.
Income on the 2nd day = Rs. (1x2) = Rs. 21.
Income on the 3rd day = Rs. (21 x 2) = Rs. 22 and so on. Thus, Income on the rath day = Rs. 2n-1.
Therefore Income on the 10th day = Rs. 29.

This question appeared in Past Papers (2 times)

Install this app on your device for quick access right from your home screen.