![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
On the calendar of a month, can you circle 3 * 3 numbers with a square so that the sum of these 9 numbers is 93? If so, what are the dates of the nine days?
The number on the right is 1 larger than that on the left, and the number below is 7 larger than that on the top. Suppose the first number is X,
The first line: X, x + 1, x + 2
The second line: x + 7, x + 1 + 7, x + 2 + 7
The third line: x + 14, x + 1 + 14, x + 2 + 14
If the sum of nine numbers is 162, you can solve x = 10 by setting up an equation. If there are other conditions, you can set up an equation in this way
RELATED INFORMATIONS
- 1. How many solutions are there for the quadratic equation 3x + y = 10, positive integer solutions
- 2. The students of class A, class B and class C planted 66 trees. The trees planted in class A were twice as many as those planted in class B. the ratio of trees planted in class C and class B was 2:3 How many trees to plant each? (cubic equation)
- 3. If lx-3l + LX + 5L = 0, then x + y=
- 4. According to the previous statistical data, if the retail price is set at 4 yuan per bottle, 400 bottles can be sold every month; if the retail price is reduced by 0.05 yuan, 40 bottles can be sold more. & nbsp; therefore, please design a plan for the store: how much yuan should the selling price be set and how many bottles of this kind of beverage can be purchased every month to get the maximum profit?
- 5. If point P (2,1) is the midpoint of a string ab of parabola y ^ 2 = 4x, the equation of AB is solved The coordinate of the point with the smallest distance from the parabola y = x ^ 2 + 2x + 1 to the straight line y = 2x-2 is?
- 6. From a to B, it takes 8 hours for a bus and 12 hours for a truck. Now the two cars travel from a to B at the same time. How many hours have the two cars gone through the whole journey?
- 7. If a times 1 / 9 = B times 5 = C times 1 / C (C is not equal to 0), then what are a and B respectively?
- 8. The walking speed ratio of Party A and Party B is 13:11. If Party A and Party B set out from both places at the same time and walk in opposite directions, they will meet in 2.5 hours. If they walk in the same direction,
- 9. When m is the value, the solution of equation 2 (2x-3) = 2x is the same as that of equation 8-m = 2 (one third x + m)
- 10. How to understand the concept of limit in higher numbers When we calculate the area of a trapezoid with curved edges, we divide it into n rectangles. When n →∞, we can think that the area of these n rectangles is equal to the area of the trapezoid with curved edges. However, no matter how large N is, there is always a "gap" that can not be covered by the rectangle. In this way, is the area we calculate not too small?
- 11. Note: no matter what value x and Y take, the value of polynomial x ^ 2 + y ^ 2 + 2x + 4Y + 8 is always positive
- 12. Four numbers are equal to 9, with an expression to achieve the result is equal to 100 Four numbers are equal to 9, can you use an expression to achieve the result equal to 100
- 13. Given that the quadratic power of A-6A + 9 and / B-1 / are opposite to each other, what is the result of calculating the cubic power of a, the cubic power of B + the quadratic power of 2a and the quadratic power of B + AB
- 14. A number is a multiple of 9 and a factor of 72. This number should be
- 15. The side area of a cylinder is 314 square centimeters, and its height is 20 centimeters. How many cubic decimeters is the volume of this cylinder
- 16. The third grade construction site transported 12 tons of cement, 8 tons per truck, and the yellow sand was six times the weight of cement. How many tons of yellow sand?
- 17. A physics problem about density The mass of a stone is 15g, and the total mass of a glass bottle filled with water is 188g. Now put the stone into the bottle filled with water, and the total mass of the glass bottle is 197g
- 18. At the Shanghai World Expo, 100 fuel cell sightseeing vehicles were in the Expo site. They drank hydrogen and produced water, realizing zero emission It is necessary to add 30% KOH solution into the fuel cell. Now there are 10kg 10% KOH solution, 14kg KOH solid and proper amount of distilled water. How many kg of 30% KOH solution can be prepared?
- 19. 1 / 2 bracket 1 / 3 (x-1) - 6 bracket = 1 the process of solving equation
- 20. Multiplication and division of rational numbers