Counting

There are 101 NRICH Mathematical resources connected to Counting
Pairs of Numbers
problem
Favourite

Pairs of numbers

Age
5 to 7
Challenge level
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If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Which ones do you have to leave out? Why?
Making Sticks
problem
Favourite

Making sticks

Age
5 to 7
Challenge level
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Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?
Nim-7
problem
Favourite

Nim-7

Age
5 to 11
Challenge level
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Can you work out how to win this game of Nim? Does it matter if you go first or second?
swimming pool
problem
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Swimming pool

Age
5 to 11
Challenge level
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In this problem, we're investigating the number of steps we would climb up or down to get out of or into the swimming pool. How could you number the steps below the water?

Count The Digits
problem
Favourite

Count the digits

Age
5 to 11
Challenge level
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In this investigation we are going to count the number of 1s, 2s, 3s etc in numbers. Can you predict what will happen?
Birthday Cakes
problem
Favourite

Birthday cakes

Age
5 to 7
Challenge level
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Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?
Tug of War
problem
Favourite

Tug of war

Age
5 to 7
Challenge level
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Can you use the numbers on the dice to reach your end of the number line before your partner beats you?

Dotty Six
problem
Favourite

Dotty six

Age
5 to 11
Challenge level
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Dotty Six is a simple dice game that you can adapt in many ways.

Which is quicker?
problem
Favourite

Which is quicker?

Age
7 to 11
Challenge level
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Which is quicker, counting up to 30 in ones or counting up to 300 in tens? Why?
Tug Harder!
problem
Favourite

Tug harder!

Age
7 to 11
Challenge level
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In this game, you can add, subtract, multiply or divide the numbers on the dice. Which will you do so that you get to the end of the number line first?