15
____
10)300
----
30 Ans. 30s.
The multiplication in the above is in appearance only, for all we get
in the Rule of Three is the ratio between the sums of money and this
ratio is an abstract number, and not concrete. On examination we find
the ratio between £10 and £20; that the latter is double, or _two_
times as much as the former, and not £2 times more than it.
We extend a general invitation to all our readers who hold a
different opinion to multiply three pints of Dewar’s Whisky by 6
quarts of soda-water, but in case they might plead inability to
perform this little feat, on conscientious grounds, we will extend
the invitation to three cups of tea by six spoonfuls of sugar. And if
any of them have a few pounds (say £10) in the Savings Bank we would
advise “Don’t _add_ any more deposits, but wait till you have £2,
then proceed to the bank and multiply the £10 by the £2, and prove
to the teller that you have £20 to your account. Be careful to take
no less a sum than £2, or the result might be a little surprising,
for if you take only £1, the teller might argue after he has received
your sovereign that “ten ones are ten,” and then your £10 would
remain the same.”
206. What is the difference between six dozen dozen and half a dozen
dozen?