The Mathematical Garden

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Games
Black and White
HEX
Magic
Mark Six
Recursion, Games and Strategy
SIM

A Magic Game

  1. Think of a 'two-digit' number (e.g.78)

  2. Subtract the two digits from the number and get the 'code'.
    (e.g. the code in this case is 78-7-8=63)

  3. Find the symbol corresponds to the code in the Table below.

  4. Memorise the symbol and then press 'Ready ?'.
    (What Did you find? Can you explain it?)

  5. Hint: (10x +y) - (x+y).

99^ 98x 97J 96v 95J 94J 93d 92f 91T 90a
89O 88{ 87J 86v 85v 84M 83m 82l 81l 80^
79^ 78I 77v 76z 75N 74x 73T 72l 71m 70h
69a 68O 67T 66M 65l 64a 63l 62O 61R 60i
59O 586 57N 56I 55O 54l 53S 52T 51^ 506
49x 486 47i 46J 45l 44^ 43R 42h 41b 40T
396 38b 37l 36l 35u 34m 33N 32N 31^ 30T
29h 28O 27l 26T 25S 246 23o 22^ 21f 20n
19M 18l 17x 16u 15l 14a 13h 12S 11x 10R
9l 8b 7o 6i 5U 4h 3v 2I 1h 0l
Ready ?
Department of Mathematics, HKU, 2010