Math PicnicEvery sheet is a promise

Always, sometimes, never

Practice Practice sheetNew questions
The question

An odd number times an even number is odd.

An odd number times an even number is odd.

An odd number times an even number is odd.
alwayssometimesnever
alwayssometimesnever
never
  1. One example that works does not prove "always" — but one that fails is enough to disprove it.
  2. So look for a counter-example: a case where the claim breaks.
  3. Try 13 and 28 — it fails, and so does every other case. So the answer is never.

How it works.

  1. 01

    One example that works does not prove "always" — but one that fails is enough to disprove it.

  2. 02

    So look for a counter-example: a case where the claim breaks.

  3. 03

    Try 13 and 28 — it fails, and so does every other case. So the answer is never.

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