Henry Ernest Dudeney/Modern Puzzles/188 - Monkey and Pulley
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Modern Puzzles by Henry Ernest Dudeney: $188$
- Monkey and Pulley
- Here is a funny tangle.
- It is a mixture of Lewis Carroll's "Monkey and Pulley", Loyd's "How old was Mary?" and some other trifles.
- But it is quite easy if you have a pretty clear head.
- A rope is passed over a pulley.
- It has a weight at one end and a monkey at the other.
- There is the same length of rope on either side and equilibrium is maintained.
- The rope weighs four ounces per foot.
- The age of the monkey and the age of the monkey's mother total four years.
- The weight of the monkey is as many pounds as the monkey's mother is years old.
- The monkey's mother is twice as old as the monkey was
- The weight of the rope and the weight at the end was half as much again as the difference in weight
- Now, what was the length of the rope?
Click here for solution
Sources
- 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Measuring, Weighing, and Packing Puzzles: $188$. -- Monkey and Pulley
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Miscellaneous Puzzles: $246$. Monkey and Pulley