EASILY ANSWERED.
“Johnny,” said his teacher, “if your father can do a piece of work in seven days, and your uncle George can do it in nine days, how long would it take both of them to do it?”
“They’d never get it done,” said Johnny; “they’d sit down and tell snake-yarns.”
[110.] A well is to be sunk by 12 men, in groups of 4 each, in 12 days. The groups work in the ratio of 6, 7, and 8; when half the task is done rain sets in and prevents them working for 2 days, in which time one man of the first, 2 of the second, and 3 of the third group go away, leaving the remainder to finish the job. What extra time did they work?
“TAKE CARE OF THE PENCE, &c.”
One of the most startling calculations is the following:—
A penny at 5 per cent. compound interest from a.d. 1 to 1890 would amount to £10,000,000,000,000,000,000,000,000,000,000,000,000, i.e., Ten Sextillions of pounds, or more money than could be contained in One Thousand Millions of Globes each equal to the Earth in magnitude, and all of solid gold.