Three More Quickies


“Professor Stewart’s Cabinet of Mathematical Curiosities”, Ian Stewart.


  1. If five dogs dig five holes in five days, how long does it take ten dogs to dig ten holes? Assume that they all dig at the same rate all the time and all holes are the same size.
  2. A woman bought a parrot in a pet shop. The shop assistant, who always told the truth said, “I guarantee that this parrot will repeat every word it hears.” A week later, the woman took the parrot back, complaining that it hadn’t spoken a single word. “Did anyone talk to it?” asked the suspicious assistant. “Oh, yes.”. What is the explanation?
  3. The planet Nff-Pff in the Anathema Galaxy is inhabited by precisely two sentient beings, Nff and Pff. Nff lives on a large continent, in the middle of which is an enormous lake. Pff lives on an island in the middle of the lake. Neither Nff nor Pff can swim, fly or teleport: their only form of transport is to walk on dry land. Yet, each morning, one walks to the other’s house for breakfast. Explain.

Shared by Nalin Pithwa.


  1. Anubhav Clancy Singh
    Posted May 31, 2017 at 1:51 pm | Permalink | Reply

    1. Five days (each dog digs a hole in five days).
    2. The parrot was deaf.
    3. The planet is divided into two halves- one water and one land? (Just a random guess).

    • Posted May 31, 2017 at 3:28 pm | Permalink | Reply

      I will also supply my own detailed solution. Bug me, if I don’t !! 🙂

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