206 ARITHMETIC. 



4. Subtract the principal from the amount, and the re- 

 mainder will be the interest. ' 



EXAMPLES. 



I. What is the compound interest of 500I. for 4 years, 

 at 5 per cent, per annum ? 



1*05 zi amount of il. for one year at 5 

 1*05 per cent. 



1050 



1-1025 

 11025 



22050 

 110250 

 11025 



I '2 1 550625 11:4th power of 1*05. 

 500IZ principal. 



607*753 12500ZI amount. 

 500 



107*753125 IT 107I. 15s. o^d. iin interest required. 



2. What is the amount of 760I. los. for 4 years, at 4 

 per cent. ? Ans. 889I. 13s. 6^d. 



3. What is the amount of 72 il. for 21 years, at 4 per 

 cent, per annum ? Ans. 1642I. 19s. lod. 



4. What is the amount of 217I. forborn 2-^ years, at 5 

 per cent, per annum, supposing the interest payable quar- 

 terly ? Ans. 242I. 13 s. 4yd. 



ANNUITIES. 



