Being curious
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What numbers can we make now?
Imagine we have four bags containing numbers from a sequence. What numbers can we make now?
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Three neighbours
Take three consecutive numbers and add them together. What do you notice?
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Digit addition
Try out this number trick. What happens with different starting numbers? What do you notice?
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The Number Jumbler
The Number Jumbler can always work out your chosen symbol. Can you work out how?
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Fruity totals
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
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Multiplication arithmagons
Can you find the values at the vertices when you know the values on the edges of these multiplication arithmagons?
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Unequal averages
Play around with sets of five numbers and see what you can discover about different types of average...
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Wipeout
Can you do a little mathematical detective work to figure out which number has been wiped out?