Conjecturing and generalising

  • Five Steps to 50
    problem

    Five steps to 50

    Age
    5 to 7
    Challenge level
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    Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?

  • Division Rules
    problem

    Division rules

    Age
    7 to 11
    Challenge level
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    This challenge encourages you to explore dividing a three-digit number by a single-digit number.
  • Sums and Differences 2
    problem

    Sums and differences 2

    Age
    7 to 11
    Challenge level
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    Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?
  • Sums and Differences 1
    problem

    Sums and differences 1

    Age
    7 to 11
    Challenge level
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    This challenge focuses on finding the sum and difference of pairs of two-digit numbers.
  • Unit Differences
    problem

    Unit differences

    Age
    5 to 7
    Challenge level
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    This challenge is about finding the difference between numbers which have the same tens digit.
  • What Could \It Be?
    problem

    What could it be?

    Age
    5 to 7
    Challenge level
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    In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?
  • Multiply Multiples 3
    problem

    Multiply multiples 3

    Age
    7 to 11
    Challenge level
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    Have a go at balancing this equation. Can you find different ways of doing it?
  • Round the Dice Decimals 1
    problem

    Round the dice decimals 1

    Age
    7 to 11
    Challenge level
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    Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?

  • Round the Three Dice
    problem

    Round the three dice

    Age
    7 to 11
    Challenge level
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    What happens when you round these three-digit numbers to the nearest 100?

  • Round the Two Dice
    problem

    Round the two dice

    Age
    5 to 7
    Challenge level
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    This activity focuses on rounding to the nearest 10.