and 4 months, at 6 per cent.? Of $200 ? Of $300? Of $50? Of $350 ? 24. What is the interest of $50 for 4 years and 6 months, at 7 per cent.? 25. What is the interest of $150 for 6 years and 7 months, at 6 per cent.? 26. What is the interest of $460 for 3 years and 2 months, at 5 per cent.? 27. What is the interest of $625 for 5 years and 3 months, at 7 per cent.? LESSON XLIV. 1. What is the interest of $100 for 1 day, at 6 per cent.? For 6 days? For 15 days? = 6 NOTE-In reckoning interest, it is customary to call 30 days a month. Hence, 1 day of a month; 6 days=3 of a month; of a month, and so on. Since the interest of $100 for 1 month is 50 cents, for go of 3 of 50 cents 13 cents; for of a month it is 10 cents, and for of a month it is of 50 cents a month it is of 50 cents = 25 cents. 2. What is the interest of $1 for 30 days, at 6 per cent.? For 60 days? For 120 days? For 20 days? For 40 days? 3. What is the interest of $20 for 5 days, at 6 per cent.? For 12 days? For 15 days? 4. What is the interest of $50 for 21 days, at 7 per cent.? For 24 days? For 45 days? 5. What is the interest of $40 for 4 years, at 6 per cent.? For 4 months? For 4 years and 4 months? For 20 days? For 4 years, 4 months und 20 days? 6. What is the interest of $400 for 6 years, 2 months and 10 days, at 2 per cent. ? 7. What is the interest of $100 for 4 months and 15 days, at 7 per cent.? 8. What is the interest of $125 for 4 years, 2 months and 10 days, at 7 per cent.? 9. What is the interest of $120 for 3 years, 4 months and 10 days, at 6 per cent.? 10. What is the interest of $140 for 1 20 days, at 6 per cent.? year and 11. What is the interest of $30 for 6 years, at 5 per cent.? At 7 per cent.? 12. What is the interest of $10 for 4 years and 3 months, at 7 per cent.? At 8 per cent.? 13. What is the interest of $150 for 5 years and 4 months, at 6 per cent. ? 14. What is the interest of $320 for 2 years, 4 months and 20 days, at 6 per cent.? 15. What is the interest of $45 for 4 years, 8 months and 16 days, at 6 per cent.? 16. What is the interest of $80 for 6 years, 6 months and 12 days, at 6 per cent.? 17. Required the interest of $126 for 3 years, 6 months and 20 days, at 6 per cent. 18. Required the interest of $175 for 4 years, 4 months and 18 days, at 6 per cent. 19. Find the interest of $210 for 3 years and 4 months, at 7 per cent. NOTE. - In reckoning interest at 4, 5, 7, or 8 per cent., it is often most convenient to find the interest at 6 per cent., and then change it to the given per cent. The interest at 4 per cent. is equal to that at 6 per cent. less of itself; 5 per cent. is 6 per cent. less of itself; 7 per cent. is 6 per cent. with added; and 8 per cent. is 6 per cent. with added. per cent. 20. Find the interest of $42 for 3 years and 2 months, at 6 per cent. At 4 per cent. At 5 At 7 per cent. At 8 per cent. 21. Find the interest of $85 for 2 years, months and 12 days, at 6 per cent. At 4 per cent. At 5 per cent, At 7 per cent. per cent. 8 At 8 At 5 per 22. What is the interest of $160 for 3 years, 4 months and 9 days, at 6 per cent.? cent.? At 8 per cent.? At 7 per cent.? 23. What is the interest of $200 for 2 years, 6 months and 15 days, at 4 per cent.? cent. ? At 6 per 24. The interest of $240 for a certain time is $18, at 6 per cent.; how much is it at 8 per cent.? 25. The interest of $225 for 4 years is $54; what is the interest for 1 year? For 3 months? For 2 months? For 1 month? 26. The interest of $120 for 1 year is $7.20 ; how much is it for 4 months? For 2 months? For 1 month and 10 days? For 20 days? LESSON XLV. 1. What is the amount of $40 for 2 years, at 6 per cent.? NOTE. The amount is the sum at interest, or the principal, and the interest taken together. The interest on $40 for 2 years, at 6 per cent.= $4.80; and $40-$4.80=$44.80, the amount. 2. What is the amount of $60 for 4 years, at 4 per cent.? 3. What is the amount of $80 for 3 years, at 5 per cent.? 4. What is the amount of $100 for 6 years, at 4 per cent.? 5. What is the interest of $70 for 6 years, at 7 per cent.? 7 6. What is the amount of $125 for 2 years, at cent.? per 7. What is the interest of $100 for 3 years and 4 months, at 7 per cent.? 8. What is the interest of $25 for 6 years and 1 month, at 6 per cent. ? 9. What is the interest of $10 for 4 years and 2 months, at 7 per cent.? 10. What is the amount of $150 for 4 years and 1 month, at 7 per cent.? 11. Required the amount of $200 for 2 years and 2 months, at 4 per cent. 12. Required the amount of $145 for 6 years and 3 months, at 8 per cent. 13. Required the amount of $400, at 3 per cent., for 2 years, 2 months and 20 days. 14. What is the amount of $140 for 5 years, 4 months and 10 days, at 7 per cent.? 15. What is the amount of $200 for 2 years, 6 months and 14 days, at 6 per cent.? 16. What is the interest of $15 for 6 years, 4 months and 2 days, at 8 per cent.? 17. What is the amount of $360 for 8 years, 2 months and 12 days, at 6 per cent.? 18. What is the amount of $180 for 6 years, 7 months and 13 days, at 7 per cent.? 19. What is the amount of $200 for 5 years and 9 months, at 4 per cent.? 20. What is the amount of $140 for 3 years, 8 months and 18 days, at 8 per cent.? 21. What is the amount of $175 for 4 years, 4 months and 9 days, at 6 per cent.? 22. What is the amount of $140 for 3 years, 6 months and 18 days, at 3 per cent.? 23. Required the amount of $160 for 9 years, at 5 per cent. 24. Required the amount of $300 for 5 years, 8 .months and 6 days, at 6 per cent. 25. What is the amount of $250 for 3 years, 6 months and 24 days, at 7 per cent.? 26. What is the amount of $500 for 1 year, 5 months and 20 days, at 10 per cent.? LESSON XLVI. 1. If the interest of $120 for 1 year is $9, what is the interest of $60? Of $20? Of $10? Of $10? Of $1? Of $60? Of $300? for 2 years is $18, Of $40? 2. If the interest of $400 for 1 year is $24, what is the interest of $100? 3. If the interest of $12 for 5 years is $3.60, what is the interest of $6? 4. If the interest of $160 what is the interest of $80? 5. If the interest of $280 what is the interest of $70? 6. If the interest of $100 what will it be for 6 years ? 4 years? For 1 year? for 3 years is $46, Of $140? for 3 years is $20, For 10 years? For 7. If the interest of $180 for 2 years is $23, what is it for 3 years? For 7 years? For 1 year? 8. If the interest of $200 for 3 years is $27, what is its interest for 1 year? For 1 month? For 4 months? For 7 months? 9. If the interest of $200 for 1 month is $1, what is it for 15 days? For 5 days? For 1 day? 10. If the interest of $140 for 1 year and 4 months is $10, what is it for 8 months? For 4 months? For 2 months? For 1 month? 11. The interest of $240, at 6 per cent., is $27 ; what is it at 3 per cent.? At 1 per cent.? 12. The interest of $320, at 7 per cent., is $15; what is it at 1 per cent.? At 8 per cent.? 13. If the interest of $100 for 3 years is $21, what is the rate per cent.? 14. If the interest of $300 for 1 year is $21, what is the rate per cent.? 15. What is the interest of $100 for 4 years, at 1 per cent.? If the interest of $100 for 4 years is $20, what is the rate per cent.? |