1) Two bills of exchange with a nominal value of € 150 and € 200, which expire after 2 and 4 years respectively, are replaced by one bill of exchange which expires after 3 years. If the discount interest rate is 4%, then find the nominal value of the single exchange rate. Equivalence period:
a) the day of calculation,
b) the common termination,
c) one year from today.
What do you notice?

2) Banknote with a nominal value of € 100 is discounted 3 years before its expiration with an annual interest rate of 4%. Find the discount and its true value.

3) Someone borrowed € 15,000 for three years with an interest rate and a fixed annual interest rate of 9%. Calculate the amount that will return, if the interest is paid periodically
a) every six months,
b) every quarter.