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Anyone know how they do this?


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Highlight to find out how it works:

It's all about the nines.

Ok, take any two digit number and subtract the second digit. That will always leave you with a multiple of ten. 86 - 6 = 80. 85 - 5 = 80. 43 - 3 = 40. See?

Next subtract the first digit. The answer will always be a multiple of nine. 80 - 8 = 72. Break it down this way: 8 * 10 - 8 * 1 = 8 * 9. Or, 10X - X = 9X.

Now look at the chart. All the multiples of 9 are the same answer. The gift changes every time, but take a look, 18, 27, 36, 45, 54... All the same.

There you have it!

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Philip,

I really dont think there is a way to trick it. The math is rock solid.

No matter what 2-digit number you pick, the computer will always guess it correctly

starting number / final answer = always a factor of 9

01 0

02 0

03 0

04 0

05 0

06 0

07 0

08 0

09 0

10 9

11 9

12 9

13 9

14 9

15 9

16 9

17 9

18 9

19 9

20 18

21 18

22 18

23 18

24 18

25 18

26 18

27 18

28 18

29 18

30 27

31 27

32 27

33 27

34 27

35 27

36 27

37 27

38 27

39 27

40 36

41 36

42 36

43 36

44 36

45 36

46 36

47 36

48 36

49 36

40 36

51 45

52 45

53 45

54 45

55 45

56 45

57 45

58 45

59 45

50 45

61 54

62 54

63 54

64 54

65 54

66 54

67 54

68 54

69 54

70 63

71 63

72 63

73 63

74 63

75 63

76 63

77 63

78 63

79 63

80 72

81 72

82 72

83 72

84 72

85 72

86 72

87 72

88 72

89 72

90 81

91 81

92 81

93 81

94 81

95 81

96 81

97 81

98 81

99 81

highlight above for the table of why

Edited by shiner
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I thought we'd already explained how the numbers thing works.

As for the card trick - write down ALL of the cards they show you at the beginning. Now, at the end - when your card has disappeared - see if any of the other original cards are there.

It's the same as this:

Pick one of these numbers and memorize it:

1 2 3 4 5

Got it? Concentrate. Now, do you still see your number:

6 7 8 9 10

Presto! Your number is gone! I'm so awesome. :P

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