Section 6.

INTEREST.

1. What is the interest of $144 for one year at 7 per

cent.?

2. What is the interest of $850 for 1 year 7 months

18 days at 7 per cent. ?

NOTE. When the interest required is for months and days at 7 per cent., the better way is to find the interest of the principal at 6 per cent. by rule, (pages 120 and 121.) and to this sum add of the interest. Hence the preceding question should be performed in the following manner.

3. What is the interest of $865.75 for 3 years 9 months

24 days at 7 per cent. ?

4. What is the interest of $960.18 for 1 year 2 months at 7 per cent. ?

5. What is the interest of $1728.19 for 3 years 8 months 10 days at 7 per cent. ?

6. What is the interest of $17.90 for 8 months 4 days at 7 per cent.?

7. What is the interest of $1165.50 for 5 years 3 months 9 days at 7 per cent. ?

8. What is the interest of $ 1237.90 for 1 year 7 months 3 days at 7 per cent. ?

9. What is the interest of $156.80 for 3 years and 3 days at 7 per cent.?

10. What is the interest of $579.75 for 1 year 2 months 2 days at 7 per cent. ?

11. What is the interest of $7671.09 for 2 years 8 months 5 days at 7 per cent. ?

12. What is the interest of $943.11 for 1 month 29 days at 7 per cent. ?

13. What is the interest of $975.06 for 2 years 7 months 9 days at 81 per cent. ?

NOTE. See note, page 121.

14. What is the interest of $ 1371.15 for 3 years 6 months 10 days at 11 per cent. ?

15. What is the interest of $871.75 for 1 year 11 months 9 days at 84 per cent.?

16. What is the amount of $976.25 for 3 years 1 month 11 days at 12 per cent.?

17. What is the amount of $1000 for 3 years 3 months 29 days, at 5 per cent. ?

18. What is the interest of $765 for two years 9 months at 1 per cent.?

19. What is the interest of $979.15 for 3 years 2 months 4 days at 21 per cent.?

20. What is the interest of $760.75 from June 7, 1841, to March 9, 1843, at 7 per cent. ?

NOTE. See rule, page 122.

21. What is the amount of $175.08 from May 7, 1841, to September 25, 1843, at 7 per cent. ?

22. What is the amount of $160 from December 11, 1843, to September 9, 1844, at 7 per cent. ?

23. What is the interest of $857.16 from February 26, 1841, to July 4, 1843, at 7 per cent.?

24. What is the interest of $171.18 from March 15, 1842, to July 17, 1844, at 9 per cent. ?

25. What is the interest of $97.19 from August 17, 1843, to November 9, 1844, at 7 per cent. ? 26. What is the amount of $765.75 from December 19, 1840, to October 11, 1843, at 6 per cent. ?

27. What is the amount of $850 from March 19, 1843, to December 11, 1845, at 9 per cent. ?

28. What is the amount of $769.87 from April 2, 1841,

to January 19, 1843, at 7 per cent.?

29. What is the interest of $1728.28 from June 7, 1842, to July 4, 1844, at 8 per cent.?

30. What is the amount of $565.25 from February 17, 1843, to January 1, 1845, at 8 per cent.?

31. $960.

Newark, N. J., Oct. 23, 1840. On demand, I promise to pay S. S. St. John, or order, nine hundred sixty dollars, for value received, with interest at seven per cent. John Q. Smith.

Attest, H. F. Wilcox.

On this note are the following indorsements.

Sept. 25, 1841. Received one hundred forty dollars.

July 7, 1842.

Dec. 9, 1842.

Nov. 8, 1843.

Received eighty dollars.

Received seventy dollars.

Received one hundred dollars.

What is due Oct. 23, 1844?

32. $1000.

New York, January 1, 1839.

Two months after date, I promise to pay S. Durand, or order, one thousand dollars, for value received, with in

terest after, at seven per cent.

Attest, William S. Hall.

Paul Sampson, Jr.

March 1, 1840.

Sept. 25, 1841.

On this note are the following indorsements.

Received one hundred dollars.

Received two hundred dollars.

Oct. 9, 1842.

July 4, 1843.

Received one hundred fifty dollars.
Received twenty dollars.

Oct. 9,

1843.

Received three hundred dollars.

What is due Dec. 1, 1844?

END.

Haverhill, (Mass.) May 22, 1843. B. Greenleaf, Esq. Dear Sir: We have examined your Arithmetics, the National and Introductory, and take pleasure in expressing to you our high satisfaction in them, as superior to any books in this branch of education with which we are acquainted. We are especially pleased with the accuracy and precision of the definitions, and with the clearness and fullness of illustration by the examples. The two together seem to be just what are needed, and we are inclined to say all that are needed on this subject in our Public Schools. In accordance with this view of your books, as members of the General School Committee, we have encouraged their use in the Schools in this town. EDWARD A. LAWRENCE, Superintending A. S. TRAIN, School Committee.

(Signed,)

Bradford, May 5, 1843.

Benjamin Greenleaf, Esq. Dear Sir: The School Committee of this town, having given the Introduction to your National Arithmetic a pretty thorough examination, very soon after its publication, voted unanimously to introduce it into our schools, and are now, after a year's experiment, happy to say, that our best anticipations have been met, in the manifest advantages which have resulted from its use, and we feel great confidence in recommending it to the attention of an enlightened public, as a work well calculated to aid youth in acquiring a theoretical and practical knowledge of that important part of eduWith much respect, I am, dear Sir, yours,

cation.

G. B. PERRY, In behalf of the Committee.

Having used Greenleaf's Arithmetic in the schools with which I have been connected for three years past, I am prepared to give it the preference over any other work of the kind with which I am acquainted.

Andover, June 6, 1843.

Very respectfully yours,
A. FARWELL,
Principal of Abbott Female Academy.

From Rev. Mr. Shailer, formerly Principal of the Connecticut Literary Institution, Suffield, Ct.

I have somewhat carefully examined the National Arithmetic, by Benjamin Greenleaf, Esq., and though having had considerable acquaintance with other works upon this science, in several years' experience as a teacher, I hesitate not to pronounce this treatise superior to any I have ever seen. It is in my opinion, impossible for a scholar to go through with this work, and understand its rules, without being qualified, so far as Arithmetic is concerned, to engage in any ordinary business, and having a foundation laid for acquiring with rapidity the higher branches of mathematics needed in professional life.

It is sufficient to say, the School Committee of this town have adopted it in all our Public Schools, which is the highest praise that we can give to any school book.

Brookline, June 6, 1843.

WILLIAM H. SHAILER, Secretary of the School Committee.

Portland, (Me.) May 22, 1843.

I have thoroughly examined, and used in my School, Greenleaf's National Arithmetic; and gladly do I embrace a favoring opportunity of rendering this Loo tardy justice to its merits, and of paying a willing tribute to its superior excellence as a system, and as a text-book.

(Signed,)

B. CUSHMAN, Late Principal of Portland Academy. 2