Math PicnicEvery sheet is a promise

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The question

4:05 to 4:30

4:054:104:154:204:254:30 4:05
  1. From 4:05 to 4:30. Count FORWARDS rather than taking one from the other — then nothing has to be borrowed and the hour never bites.
  2. It all sits inside the one hour, so there is nothing to cross: 25 minutes straight through to 4:30.
  3. So it is 25 minutes.

How it works.

  1. 01

    From 4:05 to 4:30. Count FORWARDS rather than taking one from the other — then nothing has to be borrowed and the hour never bites.

  2. 02

    It all sits inside the one hour, so there is nothing to cross: 25 minutes straight through to 4:30.

  3. 03

    So it is 25 minutes.

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