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).

99R 98N 97m 96O 95^ 94a 93l 92x 91f 90h
89J 88z 87h 86^ 85b 84N 83S 82h 81^ 80o
79R 786 77f 766 75d 74u 73m 72^ 71^ 70R
69n 68m 67f 66I 65z 64x 63^ 62a 61h 60n
59z 58l 57T 56U 55{ 54^ 53R 52d 51n 50S
49{ 48o 47f 46f 45^ 44f 43{ 42i 41S 40{
39o 38o 37z 36^ 35u 34f 33n 32{ 31J 30i
29S 28d 27^ 26S 25d 24m 23T 22n 21S 20I
19l 18^ 17u 16M 15o 14h 13N 12O 11z 10U
9^ 8^ 7S 6b 5i 4J 3U 2U 1S 0^
Ready ?
Department of Mathematics, HKU, 2010