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).

99h 98R 97U 96O 95x 94f 93l 92J 91n 906
89o 88l 87l 86N 85b 84I 83b 82a 81I 80d
79z 78v 77x 76^ 75M 74v 73U 72I 71^ 70o
69l 68M 676 66U 65^ 64{ 63I 62a 61v 60n
59S 58S 576 56i 55l 54I 53i 52O 51I 50d
49S 48l 47{ 46v 45I 44u 43m 426 41f 40N
39x 38z 37a 36I 35z 34J 33u 32I 31{ 306
29d 28u 27I 26O 25x 24O 23O 22v 21n 20U
19f 18I 17o 16^ 15I 14m 13S 12z 11l 10N
9I 8^ 7f 6h 5o 4v 3R 2n 1h 0I
Ready ?
Department of Mathematics, HKU, 2010