Fun at sing sing

Puzzle

Two pals who did "pick it" duty (oakum) at Sing Sing evolved the following problem: "If you gave forty seven cents for one hundred apples, and sold them for seventy cents, what per cent profit would you make on your investment?"

Answer

References

• Loyd, Sam [1914]. in Loyd, Sam, Jr.: Sam Loyd's Cyclopedia of 5000 Puzzles Tricks and Conundrums (in English). New York: Lamb Publishing company, page 56.