A is a non-zero natural number. Among the true fractions whose denominator is a, the smallest is () and the largest is. Among the false fractions whose numerator is a The smallest is, the largest is

A is a non-zero natural number. Among the true fractions whose denominator is a, the smallest is (1) and the largest is (A-1)
Where the molecule is a pseudo fraction of a, the smallest is (A / a) and the largest is (A / 1)

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1. A natural number greater than zero multiplied by fractional product must be less than this number
2. The quotient of a natural number divided by a false fraction is less than the divisor, right Two numbers, no matter what, as long as the product is 1, they must be reciprocal to each other. Right If we say that "the area of corn field is equal to seven ninth of that of wheat field", then "the area of corn field is less than that of wheat field" Two out of nine. Right? Online waiting for the answer, offering a reward of 10 points
3. If we know that seven a is a false fraction and eight a is a true fraction, then a = () (a is a natural number)
4. 8 / X (x is a non-zero natural number), which is a true fraction; when x is (), it is the smallest false fraction; when x is greater than (), it is a true fraction; when x is greater than (), it is the smallest false fraction; When x is () Yes, it is the smallest composite number
5. Can other non-zero natural numbers be converted into pseudo fractions with denominators of 1, 2, 3?
6. The numerator of a false fraction is 47, which is transformed into three continuous natural numbers with fractions, numerator denominator and integer
7. The numerator of a false fraction is 55. After transforming the false fraction into a band fraction, the integer part, numerator and denominator are adjacent natural numbers, and the band fraction is 55______ ．
8. The sum of 15 non-zero natural numbers is 76, and one of them must be greater than or equal to 6. Why?
9. Given that 1 / 4 > 2 / 4 > 1 / 5, a is a non-zero natural number, then a is ()
10. A is a non-zero natural number. In the following formulas, the smallest number is () A.A × 2 / 5 B.A × 7 / 5 C.A △ 1
11. Let 1, 2, 3 It is known that the last 13 digits of the product are all exactly 0. May I ask: what is the minimum natural number that appears at the end of multiplication?
12. The last 13 bits of the product of several continuous natural numbers 1,2,3... Are all 0. What is the largest word number?
13. The last 13 bits of the product of some continuous natural numbers 1.2.3 are all 0 What is the largest natural number?
14. If a natural number is represented by N, how can two adjacent natural numbers be represented? If the sum of the three natural numbers is 255, what are the three numbers?
15. Two adjacent natural numbers must be coprime numbers______ (judge right or wrong)
16. Two adjacent natural numbers must be coprime numbers______ (judge right or wrong)
17. If √ 26-n is an integer, find the value of natural number n Be careful! And there are negative integers
18. Why is the number in the sixth row and the forty fifth column arranged in the following order? "If the natural numbers are arranged in the following order, what is the number in the sixth row and the forty fifth column? 0 | 10 days and 1 hour to the end of the question | questioner: Seven_ Month_ Snow Report Why does it decrease from the first line to the sixth line There are also attached pictures to explain why they are not shown
19. Arrange the natural numbers according to the rules in Figure 1. Each natural number corresponds to a coordinate. For example, the coordinate corresponding to number 3 is (1,1) What is the coordinate of 2010? In which quadrant? Figure zhidao.baidu.com/question/389289072 .html
20. According to the rule in Figure 2-3, if the m-th number in line n is? (expressed by the algebraic formula of N, and N is greater than m), then the 2002 number in line 2001 should be one two hundred and thirty-four five thousand six hundred and seventy-eight ten trillion and one hundred and eleven billion two hundred and thirteen million one hundred and forty-one thousand five hundred and sixteen . Figure 2-3