Expanding and factorising quadratics

  • What's Possible?
    problem

    What's possible?

    Age
    14 to 16
    Challenge level
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    Many numbers can be expressed as the difference of two perfect squares. What do you notice about the numbers you CANNOT make?

  • Why 24?
    problem

    Why 24?

    Age
    14 to 16
    Challenge level
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    Take any prime number greater than 3 , square it and subtract one. Working on the building blocks will help you to explain what is special about your results.

  • Number rules - OK
    problem

    Number rules - OK

    Age
    14 to 16
    Challenge level
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    Can you produce convincing arguments that a selection of statements about numbers are true?

  • Perfectly Square
    problem

    Perfectly square

    Age
    14 to 16
    Challenge level
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    The sums of the squares of three related numbers is also a perfect square - can you explain why?

  • Difference of Two Squares
    problem

    Difference of two squares

    Age
    14 to 16
    Challenge level
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    What is special about the difference between squares of numbers adjacent to multiples of three?

  • Pythagoras Perimeters
    problem

    Pythagoras perimeters

    Age
    14 to 16
    Challenge level
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    If you know the perimeter of a right angled triangle, what can you say about the area?

  • Square Number Surprises
    problem

    Square number surprises

    Age
    14 to 16
    Challenge level
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    There are unexpected discoveries to be made about square numbers...

  • 2-Digit Square
    problem

    2-digit square

    Age
    14 to 16
    Challenge level
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    A 2-Digit number is squared. When this 2-digit number is reversed and squared, the difference between the squares is also a square. What is the 2-digit number?

  • Geometric Parabola
    problem

    Geometric parabola

    Age
    14 to 16
    Challenge level
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    Explore what happens when you draw graphs of quadratic equations with coefficients based on a geometric sequence.
  • Mega Quadratic Equations
    problem

    Mega quadratic equations

    Age
    14 to 18
    Challenge level
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    What do you get when you raise a quadratic to the power of a quadratic?