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River Crossing

Age 11 to 18
Challenge Level Yellow star
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The fox, the hen and the corn

Who should the farmer take on the first trip out?

If the farmer takes the fox, the hen and corn will be left behind.
If the farmer takes the hen, the fox and corn will be left behind.
If the farmer takes the corn, the hen and fox will be left behind.


Adults and children

The first boat trip can either have one adult, one child, or two children in it, and someone will need to row the boat back.

The children will have to work harder than the adults!

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Can you explain the strategy for winning this game with any target?

Latin Numbers

Can you create a Latin Square from multiples of a six digit number?

Dozens

Can you select the missing digit(s) to find the largest multiple?

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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