MATHEMATICAL PUZZLES.

No. 5.

Two boys kept neighboring apple stands, and each had thirty apples to

sell every day. One sold his at the rate of two for five cents, and

received seventy-five cents, and the other at three for five cents, and

received fifty cents, the total being one dollar and twenty-five cents.

It happened one day that one of the boys was sick, and the other engaged

to sell the whole stock of sixty apples at the same rate. "Two for five,

and three for five, that's five for ten," said he, and five for ten he

sold them. But to his astonishment, when he got through he had but one

dollar and twenty cents instead of one dollar and twenty-five cents. Now

how did he lose five cents?

No. 6.

"How old are your children?" asked a lady who was visiting a friend, the

mother of three beautiful daughters. "My oldest daughter is just double

the age of my youngest daughter," replied the mother, "and the age of my

other child is that of her youngest sister and one-third more. Their

three combined ages make exactly the sum of my age, and I shall be

sixty-six one year from to-day." What was the age of each of the three

daughters?

Harper's Young People, January 6, 1880 An Illustrated Weekly · 第 17 / 58 题