THE MAGIC OF FIGURES
If our penny had been current coin in the first year of the Christian era, and had been invested at compound interest at five per cent., it would have amounted in 1905 to more than £132,010,000,000,000,000,000,000,000,000,000,000,000.
This gigantic sum would afford an income of £101,890,000,000,000,000,000 every second to every man, woman, and child in the world, if we take its population to be 1,483,000,000 souls!
Absurdly small in contrast to these startling figures is the modest eight shillings which the same penny would have yielded in the same time at simple interest.
No. XXIV.—ILLUSION OF LENGTH
Here in another form is shown the illusion of length.
At first sight it seems that the two upright lines are distinctly longer than the line that slopes, but it is not so.
WHAT IS YOUR AGE?
Here is a neat method of discovering the age of a person older than yourself:—