We often encounter digital puzzles in primary school mathematics, which is to find out the numbers represented by Chinese characters or letters according to formulas. To solve the mystery of numbers, we should carefully analyze the quantitative relationship in the formula, select the characteristic part as the starting point, make a judgment, make a reasonable estimate of some digits, and gradually eliminate the unqualified digits by experiment when necessary. 1-Take digits as the breakthrough. Mashan example 1. In the formula on the right, different Chinese characters represent different numbers, and the same Chinese characters represent the same numbers. Q: What numbers do "horse, mountain, town and small" represent respectively? Town Small 9 Town (1) From the formula, we can see whether a product of four digits is multiplied by nine or four digits, so "horse" =l and "small" =9. This is the breakthrough of this problem. (2) The product of "mountain" and 9 cannot be full ten, and "mountain" can only be L or 0, because "horse" =l and "mountain" _ 0; The product of "small" and 9 is entered into ten digits, and the number of units after the product of "Zhen" and 9 plus 8 is O, so "Zhen" =8. So "horse, mountain, town and small" stands for L, O, 8 and 9. 2. Take the first or last digit of a number as the breakthrough point. In the formula on the right, different Chinese characters represent different numbers in the digital puzzle, and the same Chinese characters represent the same number-solving the digital puzzle.