Two odd numbers will have an even number, so the first 99 numbers have 66 odd numbers and 33 even numbers, and the100th number is odd.
The flat code is introduced as follows:
A flat code refers to a number in a number. If the flat code of the bet is consistent with the corresponding digits of the number, it is regarded as winning the prize. The winning amount depends on different gameplay and bet amount. For example, if you buy a single pair with the same size, the number is 5. When the number is 5, you win the prize. If the bet amount you buy is 10 yuan, then the winning amount is 10 yuan.
Mark the spaces from the first line to the third line as ABCDEFGH to get a 9, so A X B = 13 and E X H = 5. There are several possibilities for A+B = 13, but A+c÷F=4, so A can only take 1, 2, 3.
The concept of flat code is also called positive code. The first six numbers issued by Mark Six Lottery Company in the current period are called flat codes, also called positive codes. The first number sent out is called Ping Code 1, followed by Ping Code 2, Ping Code 3 ... Ping Code 6, and they are not sorted by size.
Mathematics is a science that studies quantitative relations and spatial forms. Mathematics originates from the abstraction of the real world. Through the abstraction of quantity and quantity relationship, graph and graph relationship, the research object of mathematics and its relationship are obtained. Based on abstract structure, mathematical conclusions and methods are formed through symbolic operation, formal reasoning and model construction of the research object, which helps people to know, understand and express the essence, relationship and law of the real world.
Mathematics is not only a tool for operation and reasoning, but also a language for expression and communication. Mathematics carries thoughts and culture and is an important part of human civilization.
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