Positive and negative numbers

  • Vector Racer
    game
    Favourite

    Vector Racer

    Age
    11 to 16
    Challenge level

    The classic vector racing game.

  • A Connect Four game with red and yellow counters placed.
    problem
    Favourite

    Connect Three

    Age
    11 to 16
    Challenge level

    In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

  • Minus One Two Three
    problem
    Favourite

    Minus One Two Three

    Age
    14 to 16
    Challenge level

    Substitute -1, -2 or -3, into an algebraic expression and you'll get three results. Is it possible to tell in advance which of those three will be the largest ?

  • game
    Favourite

    Vector Gem Collector

    Age
    14 to 18
    Challenge level

    Use vectors to collect as many gems as you can and bring them safely home!

  • First Connect Three for Two
    game

    First Connect Three for Two

    Age
    7 to 11
    Challenge level

    First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.

  • Small tomato seedlings in pink pots.
    problem

    Negative Dice

    Age
    11 to 14
    Challenge level

    If the odd numbers on two dice are made negative, which of the totals cannot be achieved?

  • Minus One Party
    problem

    Minus One Party

    Age
    11 to 14
    Challenge level

    Weekly Problem 47 - 2013
    What is the value of the given expression?

  • Pair Sums
    problem

    Pair Sums

    Age
    11 to 14
    Challenge level

    Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?

  • Small tomato seedlings in pink pots.
    problem

    Sum One Special

    Age
    11 to 14
    Challenge level

    Three different integers have a sum of 1 and a product of 36 - what are they?

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