(1) 2.3.5.7.11.13. (), () find the law

17 and 19 are prime numbers

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2. A rope is six meters long and divided into eight sections on average. How long is each section? How many parts of each section?
3. Is 10000 square meters equal to one hectare?
4. Who can solve the number reasoning problem 16,8,8,12,24,32,60
5. Given that the domain of F (x) and G (x) is r, where f (x) is odd, G (x) is even, and f (x) + G (x) = 1 / (square of X + X + 1), then the range of F (x) / G (x) is? Why?
6. In an equilateral triangle ABC, P is a point on edge AB, q is a point on edge AC, and AP = CQ. The distance between point a and the midpoint m of line PQ is 19 cm, then the distance between point P and point C is? (draw the picture by yourself, the original question is this.) Note: there is no need to draw a picture when answering You can't assume it
7. Stock calculation A stock is a fixed growth stock with an annual growth rate of 5%. This year, it just received a dividend of 8 yuan, and the risk-free rate of return is 10%. The average rate of return of all stocks in the market is 18%, and the β value of the stock is 1.5, and the intrinsic value of the stock is () A、50.05 B、49.41 C、45.23 D．61.71
8. How to convert ml and G? Is 500 g equal to 500 ml?
9. Mathematics problem: in the subject collection of the school library, Chinese books and foreign language books account for about 1 / 5, mathematics books account for about 1 / 10, history, geography and students books account for about 1 / 6, and the rest of the books are classified into other categories. According to these data, draw a fan statistical chart of the subject collection of the school library Note: there should be a detailed process, no process do not send
10. Make the function y = f (x) = 100, X is contained in the image of R, and find the detailed solutions of F (- 10), f (0), f (1000). Thank you
11. Use the four numbers 1, 3, 3 and 8 to form the formula of 24
12. 7 / 8 of a number is 14. What's the number
13. Given the sequence {an}, A1 = 1 / 3, the relation between Sn and an is Sn = n multiplied by (2n-1) multiplied by an, the general formula of {an} is obtained
14. A series problem of administrative ability test Sequence: 12,3,4,9,25,3,5,15,36,2,6,) Option: a.13 b.12 c.11 d.10 Explain the sequence law of this problem
15. X = () y = ()
16. Given 2 ^ a · 3 ^ B = 216, where a and B are natural numbers, find the value of a ^ 2 · B ^ 3
17. Divide a circle into several parts evenly and form an approximate rectangle. The perimeter of the rectangle is 8 cm longer than that of the circle. What is the area of the circle______ Square centimeter
18. For a square with side length of 12 cm, draw a semicircle with the diameter of four sides. What is the area of the shadow part surrounded by these four arcs?
19. A square with a side length of 10 cm is used to draw a semicircle with four sides as the diameter. What is the area of intersection of these four arcs?
20. As shown in the figure, the side length of the square is 4cm, and one side is the diameter. Draw four semicircles respectively to find the area of the four leaf pattern