How many days would it take to become a millionaire, if you invested £1 in an account that doubled its contents every day?

If you invested £1 in an account that doubled its contents every day, it would take 20 days to become a millionaire. The reason for this exponential growth is that each day, the amount in the account doubles, leading to a rapid increase in wealth. Starting with just £1, after 10 days, you would have £512. After 15 days, you would have £32,768. And finally, after 20 days, you would reach the million-pound mark. This demonstrates the power of compounding interest and the potential for significant wealth accumulation over a short period of time.