Being collaborative

There are 308 NRICH Mathematical resources connected to Being collaborative
Seeing Parallelograms
problem
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Seeing parallelograms

Age
7 to 11
Challenge level
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Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Rhombus It
problem
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Rhombus it

Age
11 to 16
Challenge level
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Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

What numbers can we make now?
problem
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What numbers can we make now?

Age
11 to 14
Challenge level
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Imagine we have four bags containing numbers from a sequence. What numbers can we make now?

More Less is More
problem
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More less is more

Age
7 to 14
Challenge level
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In each of these games, you will need a little bit of luck, and your knowledge of place value to develop a winning strategy.
An Easy Way to Multiply by 10?
problem
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An easy way to multiply by 10?

Age
7 to 11
Challenge level
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Do you agree with Badger's statements? Is Badger's reasoning 'watertight'? Why or why not?
Three neighbours
problem
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Three neighbours

Age
7 to 14
Challenge level
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Take three consecutive numbers and add them together. What do you notice?
Dicey Array
game
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Dicey array

Watch the video of this game being played. Can you work out the rules? Which dice totals are good to get, and why?

Equivalent Pairs
problem
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Equivalent pairs

Age
5 to 7
Challenge level
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Can you match pairs of cards which show the same amount?
Are you well Balanced?
problem
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Are you well balanced?

Age
5 to 7
Challenge level
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Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
Guess What?
problem
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Guess what?

Age
7 to 11
Challenge level
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Can you find out which 3D shape your partner has chosen before they work out your shape?