Being collaborative

There are 308 NRICH Mathematical resources connected to Being collaborative
Castles in the middle
problem
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Castles in the middle

Age
7 to 14
Challenge level
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This task depends on groups working collaboratively, discussing and reasoning to agree a final product.
Dicey Addition
problem
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Dicey addition

Age
5 to 11
Challenge level
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Who said that adding couldn't be fun?
Sweets in a box
problem
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Sweets in a box

Age
7 to 11
Challenge level
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How many different shaped boxes can you design for 36 sweets in one layer? Can you arrange the sweets so that no sweets of the same colour are next to each other in any direction?

Two flowers with the numbers 15 and 16 on them
problem
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Butterfly flowers

Age
5 to 7
Challenge level
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Can you find two butterflies to go on each flower so that the numbers on each pair of butterflies adds to the number on their flower?

Quadrilaterals
problem
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Quadrilaterals

Age
7 to 11
Challenge level
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How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?

All the Digits
problem
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All the digits

Age
7 to 11
Challenge level
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This multiplication uses each of the digits 0 - 9 once and once only. Using the information given, can you replace the stars in the calculation with figures?
5 on the clock
problem
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5 on the clock

Age
7 to 11
Challenge level
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On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?
Ten Hidden Squares
problem
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Ten hidden squares

Age
7 to 14
Challenge level
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These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?
Areas of parallelograms
problem
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Areas of parallelograms

Age
14 to 16
Challenge level
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Can you find the area of a parallelogram defined by two vectors?
Secret Number
problem
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Secret number

Age
5 to 7
Challenge level
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Annie and Ben are playing a game with a calculator. What was Annie's secret number?