CHAPTER LI. From some of the examples in the preceding three chapters the pupil may have noticed that at 6% any sum of money in 2 months, that is, of a year, will gain 1%, or 0.01 of itself. In other words to find the interest at 6% of any sum of money for 2 months, we take ido of the sum, that is, we move the decimal point two places to the left. Thus the interest of $25 for 2 months is $0.25. 1. At 6% find the interest for 2 months of $10. $84. $876. $5533. 50. 73. 743. 8756. 846. 657. 3482. 15. 519. 535. 1395. 5. 184. 475. 4876. 21. 2. At 6% find the interest for 1 month of $28.* $100. $1216. $2768. 16. 222. 1604. 3544. 10. 364. 1828. 4224. 48. 548. 2416. 5664. 34. 636. 3614. 8422. * First find the interest for 2 months, 3. At 6% find the interest for 4 months of 4. At 6% find the interest for 10 months of $1. $12. $100. 150. 220. 540. 624. 303. 404. 711. 850. $2000. 4400. 5600. 7625. 8120. 3110. 6212. 5408. 4231. As 6 days is in of 60 days (2 months) for 6 days at 6% any sum of money will gain of 1%, or 0.001 of itself. In other words to find the interest of any sum of money at 6% for 6 days, we take iooo of the sum, that is, we move the decimal point three places to the left. Thus the interest of $20 for 6 days is $0.02. 5. At 6% find the interest for 6 days of $80. $370. $2500. $13400. 100. 560. 5600. 27850. 170. 280. 2150. 35430. 540. 215. 4280. 59650. 235. 410. 8750. 84320. 419. 270. 9430. 97650. 6. At 6% find the interest for 12 days of 1 7. At 6% find the interest for 18 days of 8600. 80700. 8. At 6% find the interest for 24 days of 9. At 6% find the interest of $30 for 2 mths. 6 dys. 2 mths. 12 dys. 8 mths 6 dys. 1 mth. 6 dys. 3 mths. 18 dys. 6 mths. 12 dys. 4 mths. 12 dys. 5 mths. 24 dys. 10 mths. 24 dys 10. At 6% find the interest of $250 for 3 mths. 6 dys. 6 mths. 6 dys. 7 mths. 6 dys. 5 mths. 12 dys. 8 mths. 12 dys. 9 mths. 12 dys. 4 mths. 18 dys. 10 mths. 24 dys. 11 mths. 18 dys. 11. At 6% find the amount of $1000 for 2 mths. 12 dys. 5 mths. 6 dys. 8 mths. 3 dys. 3 mths. 18 dys. 6 mths. 12 dys. 9 mths. 9 dys. 4 mths. 24 dys. 7 mths. 18 dys. 10 mths. 15 dys. 12. At 6% find the interest of $12 for 1 yr. 1 mth. yr. yr. 9 mths. 1 yr. 8 mths. 1 yr. 7 mths. 1 yr. 11 mths. 13. At 6% find the interest of $222 for 2 yrs. yrs. 6 mths. 3 yrs. 4 mths. 3 yrs. 3 mths. 3 yrs. 5 mths. 4 yrs. 3 mths. 4 yrs. 5 mths. 4 yrs. 4 mths. 14. At 6% find the interest for 1 yr. 8 mths. of $1. $25. $530. $5741. 2324. 1716. 3215. 15. At 6% find the interest of $420 for yr. 4 mths. 12 dys. 1 yr. 1 mth. 1 dy. 1 yr. 6 mths. 18 dys. If any other than 6% is required, first get the interest at 6%, and then find such part of the result as the given per cent is of 6%. Thus, for 2% take 1 of 6% ; for 3% of 6%. For 4% deduct } of the result at 6%. For 5% deduct of the result at 6%. It may be easier to divide the given time, or the given principal. Thus, 2% for 9 months is the same as 6% for 3 months; 5% for 24 months is the same as 6% for 20 months. $10 at 3% is the same as $5 at 6%. 16. At 2% find the interest of $540 for 6 mths. 18 dys. 9 mths. 27 dys. 2 mths, 6 dys. 3 mths. 18 dys. 12 mths 18 dys. 1 mth. 12 dys. 17. At 3% find the interest of $1200 for 4 mths. 12 dys. 8 mths. 12 dys. 3 mths. 6 dys. 6 mths. 24 dys. 10 mths. 24 dys. 5 mths. 18 dys. |