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

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savings at 5 per cent. per annum compound interest; what amount
would be accumulated in ten years?
17. An estate was mortgaged for ~2079. 15s., upon whichl interest
was payable at 4- per cent. per annum. Supposing no payments
macle until the expiration of 71 years, when the whole debt was
cleared off, find the accumulated amount clue at that time.
18. If a sum of money were put out to interest at 5 per cent. per
annum, in how many years would it double itself (1) at simple
interest, (2) at compound interest?
19. A sum of money was put out at 5 per cent. per annum compound interest; and the interest in four years was ~107.15s. 0-clo
AWhat was the sum?
YIII.
1. What is meant when it is said that consols are at 88-? What
are they at when ~9000 is paid for ~10000 consols?
2. What sum will be required to purchase ~250 stock in the 3 per
cent. consols when they are at 95 — per cent.? And conversely, what
stock in the 3 per cent. consols can be purchased for ~238. 8s. 9d., when
the-y are at 95-|? What would be the difference in each case by
taking into the account the commission of the broker at -- per cent.?
3. If the 3 per cent. consols are at 94, what should be the price of
the 4 per cents to give the same rate of interest?
4. If the 3 per cents be at 96, and the 3i- per cents at 103, which
stock gives the greater interest?
5. A person invests ~4600 in the 3 per cents at 91T, and sells out
at 95- a year afterwards. What percentage does he get for his money,
the broker charging - per cent. for both the purchase and sale?
6. Which is the better investment, bank stock paying 10 per cent.
at 317, or 3 per cent. consols at 95?
7. A perseon holds as much stock of a certain kind as is worth
~879, the price being ~97. lOs. for ~100 stock; there is also another
stock which sells at ~88. 5s. for ~100; find how much of the latter
stock he ought to receive in exchange for his property in the former.
8. Which is the more profitable investment, the purchase at ~96
of 3 per cent. consols, or the purchase of shares in an insurance office
at ~227 per share, the annual dividend on a share being ~7. 10s.?
9. Shew that the interest obtained by investing a sum of money
in the 3 per cents at 821, is to the interest obtained by investing the
same sum in the 3~ per cents at- 93.-1, as 34 to 35.
10. What amount of stock in the 31- per cents will give the same
annual income as ~3560. 8s. of the 3 per cent. stock?
11. What must be the price of stock in the 3 per cent. consols, that
cap:tal invested therein may produce 5 per cent. per annum?
12. If ~1000 be invested in the purchase of 3 per cent. stock at
81 at what rate must the stock be sold to gain ~100?