How to construct a fifth order magic square with 25 numbers 8-32
18 25 32 9 16
17 19 26 28 10
11 13 20 27 29
30 12 14 21 23
24 31 8 15 22
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- 1. What are the other units of measurement between micron (μ m) and nanometer (nm), nanometer and Pico meter (PM), Pico meter and flying meter (FM), and what is the rate of advance? Pay attention to the symbols
- 2. How many micrometers is one meter? How many nanometers is one meter?
- 3. How many meters is a micron?
- 4. If x > 1, Y > 1 and lgx + lgY = 4, then the maximum value of lgx · lgY is?
- 5. Given that a and B are two of the equations x2 + (m-2) x + 1 = 0 about X, then the value of (1 + Ma + A2) (1 + MB + B2) is______ .
- 6. What is the product of two prime numbers
- 7. In diamond ABCD, the point P and Q are on the edge AB and BC respectively, and AP = BQ. Try to judge the shape of △ PDQ and prove it
- 8. As shown in the figure, in the trapezoidal ABCD, ad ∥ BC, AC and BD intersect at O, and parallel lines passing through o intersect AB and CD at e and f respectively. (1) prove that OE = of; (2) if ad = 3, BC = 4, find the length of EF
- 9. It is known that P1 (2,3), P2 (- 1,4), P is on the extension line of the straight line p1p2, and the vector | p1p | = 2 | PP2 |
- 10. If it is known that the length of the side edge of the regular triangular prism abc-a1b2c3 is equal to the length of the side edge of the bottom, what is the sine value of the angle between Ab1 and acc1a1
- 11. Put a magic square of order 5 with 25 numbers of 3 ~ 27 fast
- 12. Use 25 numbers 3 ~ 27 to arrange a magic square of order 5
- 13. Use 12.15.17.19.21.23.25.27.29 to compile a third-order magic square? Ask to do it in a square,
- 14. 3 5 7 9 11 13 15 17 19 how can they be arranged so that they are equal horizontally and vertically
- 15. 11 13 17 19 23 29
- 16. Please use 7, 9, 11, 13, 15, 17, 19, 21, 23 to form a third-order magic square fast
- 17. Make a magic square of order 9 by using "Rob's method"
- 18. Try 1-25 to make a magic square
- 19. How to use Rob's method to make a 1 ~ 25 fifth order magic square
- 20. The square of X - 3x + 2 = 0, X1 = 1, X2 = 2, the square of X - 3x + 2 = (x-1) (X-2) The square of 5x - 4x-1 = 0, X1 = 1, X2 = - 1 / 5, the square of 5x - 4x-1 = 5 (x-1) (x + 1 / 5) Find the generalization of the conclusion and write it out