Suppose you borrow $150 from a payday lender for one week at a weekly rate of 10%. You'll obviously owe $165 at the end of a week. If you are unable to repay the loan, however, the lender will say that you now owe not only $165 but also 10% of that $165 at the end of the second week.

How much will you owe by the end of the second week?

$

If you still can't repay any of it, how much will you owe at the end of the third week?