Monday 9th February 2026
    Difficulty: Very hard

    Ping pong (#1,179)

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    Photo by TSD Studio (Unsplash)

    Ping pong (more correctly known as table tennis) is a sport derived from lawn tennis but played on top of a table.

    1. What is the diameter of a ping pong ball?

    2. When did the change from a 21-point to an 11-point scoring system take effect?

    3. When a ping pong ball is dropped onto a ping pong table from a height of 30 cm, how high should it bounce (according to the rules of table tennis)?

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