Elementary arithmetic, with brief notices of its history... by Robert Potts.

10

average prices of wheat, barley, oats, and beans per quarter are
48s. 9d., 30s. 4d., 23s. 6d., and 33s. 5d. respectively.
10. If the sixpenny loaf weigh 4'351b. when wheat is at 5'75s. per
bushel, what ought to be paid for 49'31b. of bread when wheat is at
18 4s. per bushel?
11. If 5 pipes of wine be bought for ~300, and one pipe be
damaged, at how much per gallon must the remainder be sold so as
neither to gain or lose by the transaction?
III.
1. What is the simple interest and amount of ~305 in 6 years at
4-1 per cent. per annum?
2. In what time will ~305 amount to ~387. 7s. at 4- per cent.
per annum simple interest?
3. If ~305 amount at simple interest in 6 years to ~387. 7s.,
what is the rate per cent. per annum?
4. VWhat principal put out to simple interest at 4. per cent. for 6
years will amount to ~387. 7s.?
IV.
1. Required the amount of ~56. 13s. 4d. put out to simple interest
for.5 years and 4 months at 6 per cent. per annum.
2. What is the commission on ~529. 18s. 5d. at 2-1 per cent.?
3. The amount of ~500 in 3 of a year was ~520. Required the
rate per cent.
4. What is the interest of ~275. 10s. for 219 days at 5 per cent.
per annum?
5. If money bear interest at 5 per cent. per annum, of what sum is
one groat the daily interest?
6. In the year 1248 A.D., the money-lenders were not allowed to
charge the scholars at Oxford a higher interest for the loan of money
than twopence for the use of one pound for a week; how much was
that per cent. per annum?
7. An estate is bought at 25 years' purchase for ~15,000, twothirds of the purchase-money remaining on mortgage at 3 per cent.;
the cost of repairs averages ~100 a year. What interest does the
purchaser make on his investment?
8. If ~5 be paid for the loan of ~100 for one year, what ought to
be paid for the loan of ~275 for 5 years?
9. If A lend B ~150 for 7 months, and when B has occasion to
borrow from A, the latter can spare only ~70; how long may B keep
the ~70 until the interest is equal to the interest of A's loan?
10. Which is the greater rate of interest, ~7 for the use of ~145 or
~4- for the use of ~91 5s. for a year?
11. The simple interest of ~25 for 3- years was found to be
~3. 18s. 9d.; required the rate per cent. per annum.