Explaining, convincing and proving

  • Four playing cards on top of each other. Each card shows a different ace.
    problem
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    Statement Snap

    Age
    7 to 11
    Challenge level
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    You'll need to know your number properties to win a game of Statement Snap...

  • problem
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    Rectangle Tangle

    Age
    7 to 11
    Challenge level
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    The large rectangle is divided into a series of smaller quadrilaterals and triangles. Can you untangle what fractional part is represented by each of the shapes?

  • Square Corners
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    Square Corners

    Age
    7 to 11
    Challenge level
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    What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?

  • Odd Squares
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    Odd Squares

    Age
    7 to 11
    Challenge level
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    Think of a number, square it and subtract your starting number. Is the number you're left with odd or even? How do the images help to explain this?

  • What Do you Need?
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    What Do You Need?

    Age
    7 to 11
    Challenge level
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    Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?

  • Magic Vs
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    Magic Vs

    Age
    7 to 11
    Challenge level
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    Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

  • Three Dice
    problem
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    Three Dice

    Age
    7 to 11
    Challenge level
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    Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?

  • Times Tables Shifts
    problem
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    Times Tables Shifts

    Age
    7 to 11
    Challenge level
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    In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?