All common factors of 16 and 20 are_________ The greatest common factor is________ ?

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• 1. English articles on Chinese population
• 2. The number of chickens raised in the farm is 5 / 12 of the total number of chickens and ducks. 74 ducks were sold. At this time, the ratio of the number of chickens to the total number of chickens and ducks is 6:7. How many chickens were there? We need formula and diagram
• 3. A shop ordered a batch of glasses, 14 yuan each, 12 of which were damaged in transit. The unit price was 18 yuan when they were sold, and the total profit was 1160 yuan after they were sold out. How many glasses did the shop order?
• 4. Find the sum of the first 20 terms of sequence 1 / 2,2 / 4,3 / 8 / 4 / 16
• 5. If the equation KX + 14 = 3 (x-1) (1) With integer solution, find the value of integer k (2) without solution, find the value of K
• 6. If two of the equations x2-kx + 6 = 0 are 5 larger than two of the equations x2 + KX + 6 = 0 respectively, then the value of K is______ ．
• 7. What is the case for the roots of the equation x2 + KX + K-2 = 0 of X
• 8. When k takes what value, the equation x2 + kx-3 = 0 and the equation x2 + x-3k = 0 have a common root? And find out the common root
• 9. We know the equation mx-m = x + 2 about X. when we find the value of M, (1) the equation has no solution; (2) the equation has a unique solution
• 10. When m is the value, the equation of X, 2 / X-2 + the square of MX / x-4 = 3 / x + 2, has no solution
• 11. English translation Module 5 Unit2 of English text in Volume 1 of junior high school
• 12. Is 2 / x = 3 a linear equation with one variable
• 13. Twenty five out of twenty eight minus (two out of seven plus three out of four) is equal to?
• 14. The sum of the three numbers is 312, which can be divided by 7, 8 and 9 respectively, and the quotient is the same______ 、______ And______ ．
• 15. The circumference of an isosceles triangle is 7 / 10 decimeters, and the length of one waist is 1 / 5 decimeters. What is the base of this triangle
• 16. Is 2 / x = 3 a linear equation with one variable? Why?
• 17. Is 3 / x = 4 a linear equation of one variable? It can be reduced to 4x = 3
• 18. Is x = 4 a linear equation with one variable
• 19. If the m-sup2; - 3 power of (m-2) x = 5 is a one variable equation of first degree, what is the value of M? If we calculate by M & sup2; - 3, m should be equal to 2, but it is contradictory to m-2 ≠ 0?
• 20. It is known that the absolute value of (K + 1) x ^ k - 5 = 7 is a linear equation of one variable about X, and the value of K is obtained