Are the stairs odd or even?

Generally speaking, the number of stairs is based on the words of life, glory, death and despair. The last step of the platform must be to live or prosper.

Most stairs are 1 1 steps, and the height of each step is about 12 to 1 5cm, which means that the stairs are generally singular, such as1,3, 7, 9, etc. Why do you say that? Because these figures are days, which means rising step by step.

According to this statement, it is best to have odd stairs. But sometimes the fact is that you are not allowed to build an odd number of steps, because the height and other dimensions of each step have their own applicable scope. For example, the height of each step should not exceed 18 cm, which is also difficult to climb.