10 million, such as 1, 2, 3, 4, 5 ... 9 at most, 2 of 12 and 3 of 53 are all.

Suppose there are 15 1, and our five quintiles are the first five 1, the middle five 1 and the last five 1. The counts are 5 10 and 15. Five numbers need only three times to count 15 1, while a number needs 15 times.

Extended data:

Shǔshù, with both verbs and noun parts of speech, refers to the calculation of detailed numbers in some way or way, usually with a wrench finger or mouth to recite spells or meditation, which is a relatively common and ordinary mathematical behavior.

1, when counting things, just count everything, and only once. Then the result of the number is always a unique number.

2. When counting things, you can change what you want to count into something else, and then count again, and the result of counting remains the same.

When counting, the last number is the result. But the counting process is infinite. If there are many things to count, you can continue to count.