Being curious

  • problem

    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?

  • Number Differences
    problem

    Number differences

    Age
    7 to 11
    Challenge level
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    Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?

  • Nine-Pin Triangles
    problem

    Nine-pin triangles

    Age
    7 to 11
    Challenge level
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    How many different triangles can you make on a circular pegboard that has nine pegs?

  • Brush Loads
    problem

    Brush loads

    Age
    7 to 11
    Challenge level
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    How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.

  • What's in the Box?
    problem

    What's in the box?

    Age
    7 to 11
    Challenge level
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    This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?

  • First Connect Three
    problem

    First connect three

    Age
    7 to 11
    Challenge level
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    Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

  • Sea Level
    problem

    Sea level

    Age
    7 to 11
    Challenge level
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    What numbers would you put on this number line as it goes under the sea level?

  • Coded hundred square
    problem

    Coded hundred square

    Age
    7 to 11
    Challenge level
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    This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

  • Nice or Nasty
    problem

    Nice or nasty

    Age
    7 to 11
    Challenge level
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    There are nasty versions of this dice game but we'll start with the nice ones...