
Originally Posted by
luther
Question 1.
During the initial 10 years, interest due at the end of year of the 1000 loan is 1000*10%=100. So annual payment during the initial 10 years at year end is 100 and amount of loan outstanding remains 1000 since no principal has been paid off. Actually, after you acquire some level of proficiency during your study, you could skip this part and jump directly into solving the second and third 10-year periods as the loan amount is the same before and after this period of time. All you need to determine is the size of annual interest payment is 100 = 1000*10% for the second part.
During the second 10 years, annual payment each year at year end = 100*150%= 150. Therefore FV at the end of the second 10 years is -203.12877 (by inputting N=10, I/Y=10, PV=1000, PMT=-150, then <CPT> <FV>). "-ve" sign means balance is a loan i.e. still owing money.
During the last 10 years, PV=203.12877 (sign changed), (N=10, I/Y=10 unchanged), FV=0, press <CPT> <PMT>, answer is -33.05827188.
Question 2.
Just allow more time for practice and observe the key words that you might have missed in your initial grasp of the problem. Part of the test is to translate a verbal problem into an algebraic form that is readily solvable. It takes time. More drill will help. It is just a phase of learning that we normally have to go through. Persevere.
Hope it helps.
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