16. I owe a man the following notes: one of $500, due
April 1 ; one of $750, dae July 15 ; and one of $1750, due
Sept. 10. The holder wishes to exchange them for two notes
of $1500 each, and wants one to &11 due May 10 ; when
should the other be made payable ?

17. A and B traded together ; A put in $400 for 512 days,
and received | of the gain ; the number of dollars which B
put in was equal to the number of days it was employed in
trade. What was B's capital 1

18. The longitude of Springfield, Mass., is 72° 35' 45" W.,
and of Constantinople, 28° 49' E. When it is 9 o'clock A. K
at the latter place, what time is it at the former ?

19. A note was given for $500, with interest payable an-
nually, at 7^. Nothing having been paid for 10 years, how
much did the total amount of interest due exceed the simple
interest of the principal ?

20. A rectangular piece of land, containing 8 A. 1 B. 32
sq. rd. is ^ as wide as it is long. What is the distance around
it?

21. Bought a quantity of goods for $2500 cash, and sold
them for $3125 on 3 months' credit What did I gain, money
being worth 9^ 1

22. What is the difierence between the interest and dis-
count of $730, for 5 yr. 9 mo., at 8 per cent. ]

23. Wishing to ascertain the height of a tower, I erected
near it a stick 2^- feet high ; by measurement I found th^
shadow of the tower to be 36 1 ft., and of the stick 9 in.
