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).

99f 98^ 976 96{ 95U 94l 93n 92O 91S 90O
89{ 88I 87a 86i 85h 84N 83l 82U 81J 80U
79N 78I 77R 76o 75i 74u 73M 72J 71l 70a
69f 68z 67h 666 65I 64U 63J 62d 61o 60u
59v 58{ 57f 56o 55I 54J 53h 52n 51o 50m
49n 48N 47z 46m 45J 44M 43o 42I 41S 40S
39^ 38o 37d 36J 35b 346 33M 32x 31M 30m
29u 28M 27J 26d 25U 24o 23d 22f 21v 20d
19u 18J 17M 16f 15l 14U 13l 12m 11x 10h
9J 8N 7{ 6M 5i 4v 3N 2v 16 0J
Ready ?
Department of Mathematics, HKU, 2010