article
Meet the Nim Family
Jennifer Piggott and the NRICH team introduce Nim-like games to help children think creatively in mathematics.
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problem
Favourite
Attractive Tablecloths
14 to 16
Charlie likes tablecloths that use as many colours as possible, but insists that his tablecloths have some symmetry. Can you work out how many colours he needs for different tablecloth designs?
problem
Favourite
How Old Am I?
14 to 16
In 15 years' time my age will be the square of my age 15 years ago. Can you work out my age, and when I had other special birthdays?
problem
Favourite
Frogs
11 to 14
How many moves does it take to swap over some red and blue frogs? Do you have a method?
article
What's X Got to Do With It?
By following through the threads of algebraic thinking discussed in this article, we can ensure that children's mathematical experiences follow a continuous progression.
problem
Favourite
Light the Lights Again
7 to 11
Each light in this interactivity turns on according to a rule. What happens when you enter different numbers? Can you work out the rule for each light?
problem
Favourite
Curious Number
7 to 11
Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?
