The magical mind-reading handed down by gypsies can measure the principle of your inner feelings.

The first step of principle analysis: flash's so-called crystal ball, each click will appear different patterns. Does this have anything to do with the number 10~99? If the number is set to 10~99, where the ten digits are x and the unit digits are y, then: (10x+y)- (x+y)= 9x, then 9x corresponds to the pattern on the crystal ball, that is, f(x) = 9x → pattern. We don't know what this corresponding rule is, but at least we know. Step 2: f(x) = 9x, where the definition range of x is x= 1, 2, 3, 4, 5, 6, 7, 8, 9, then the value range of f(x) is: F (x) = 9, 18, 27. As long as you follow the calculation method required by the game (that is, like 23-5= 18), the result can only be one of the numbers 9, 18, 27, 36, 45, 54, 63, 72, 8 1. Then in the flash file, among the patterns numbered from 0 to 99 given on the right side of the crystal ball, only the patterns numbered 9, 18, 27, 36, 45, 54, 63, 72, 8 1 are useful, and other numbered patterns are just random to confuse the audience. Step 4: Further observation shows that the patterns numbered 9, 18, 27, 36, 45, 54, 63, 72, 8 1 on the right side of the crystal ball are the same, but: ① Every time we play, the numbers are 9, 18, 27. ② The patterns on these numbers change randomly, that is, from one pattern to another. (3) Other random numbering patterns used to confuse people remain unchanged. Because these useless numbering patterns are numerous, they are mixed with useful numbering patterns. If you don't look carefully, it's easy to think that the pattern number table given by the game is unchanged. The effect of this is rather confusing. Step 5: Now we know that in f(x) = 9x, no matter how much value X takes, the result corresponds to a pattern. That is to say, in the range of 10~99, no matter which number you choose to calculate, the corresponding number pattern is the same. Thus, after calculation, you firmly remember the corresponding number pattern in your mind according to the calculation result. So, you've been played! Step 6: The whole game process can be briefly described as follows: ① You choose a number from 10~99 to calculate; ② The calculation result is nothing but one of 9, 18, 27, 36, 45, 54, 63, 72, 8 1; ③ The numbering patterns of 9, 18, 27, 36, 45, 54, 63, 72 and 8 1 are all the same; (4) You have memorized the same pattern on the numbers 9, 18, 27, 36, 45, 54, 63, 72, 8 1; ⑤ You click on the crystal ball, and the crystal ball displays the pattern; 6. If you want to play for the second time, click "Try again!" Button; ⑦ When you click this button, the numbered pattern list will be refreshed once, and the patterns on numbers 9, 18, 27, 36, 45, 54, 63, 72, 8 1 will become another identical pattern at the same time; ⑧ The game is restored to the replay screen; Pet-name ruby you repeat the first to the last link, the game can continue to play.