All posts tagged "mathematical tricks"

  • tree
    Christmas maths activity: Make your own Christmas tree

    A Christmas tree has roughly a conical shape. Consequently, it is quite easy to make a decoration in the form of a Christmas tree from cardboard or other suitable material. by Franka Miriam Brueckler The surface of the...

    • Posted February 3, 2016
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  • christmas-clip-art-tree-star-gold1
    Christmas maths activity: Stars and rotational symmetry

    One of the most used Christmas motives are stars. As ornaments they appear in various designs and with various numbers of spikes, but one thing is common to most Christmas star designs: they posess rotational symmetry. by...

    • Posted February 3, 2016
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  • Guessing the Numbers

    For this trick, you need a number of small counters: coins, pebbles, matches, … by Franka Miriam Brueckler The effect You, the performer, ask a spectator to take the counters into his/her hands and distribute them in...

    • Posted February 1, 2016
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  • mug-of-beer
    A Beer Trick

    The trick is performed by a (mathe)magician with a participator. In the following dialogue, the mathemagician’s text is printed in Roman, and the participator’s in Italics. If you do not know the trick, I encourage you to...

    • Posted February 1, 2016
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  • 3_playing_cards
    Magical Invariants

    What remains unchanging? On what can one rely? For centuries, mathematicians have searched for invariants, that is, to put it simply, quantities whose values do not change with respect to some operation under consideration. By Ehrhard Behrends...

    • Posted February 1, 2016
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  • 3_playing_cards
    Magical mathematics: The Integers

    I would like to introduce to you a little guessing game… By Ehrhard Behrends Choose a three-digit number and write it twice in succession. For example, if you chose 761, then you should write down 761 761. The...

    • Posted February 1, 2016
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  • cursive-number-22
    Always 22

    A number magic trick with number 22. by Franka Miriam Brueckler Number magic is one of the most important “subclasses” of mathematical magic, especially useful in spontaneous situations in small groups of people as it usually requires no...

    • Posted February 1, 2016
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  • 3_playing_cards
    The four ducks trick

    The described trick is a “ducky” version of the trick known as Yates’ Four-Divination, which is described in Martin Gardner’s book “Mathematics, Magic and Mistery” (Dover Publ., New York, 1956). by Franka Miriam Brueckler Move the ducks! There...

    • Posted February 1, 2016
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  • B0016P 0262
    Gergonne’s trick

    Gergonne’s trick is probably the best known of the mathematically based magic tricks, and is known in several variations… by Franka Miriam Brueckler It was first analysed and generalised by the 19th century French mathematician Joseph Diaz...

    • Posted February 1, 2016
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  • 3_playing_cards
    The Three Ducks Trick

    The described trick is a “ducky” version of the trick known as Hummer’s 3-Object Divination, which is described in Martin Gardner’s book “Mathematics, Magic and Mistery” (Dover Publ., New York, 1956). by Franka Miriam Brueckler There are...

    • Posted February 1, 2016
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