According to the law of numbers in the figure, what text should be filled in the question mark?

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• 1. [help] according to the law of numbers in the figure, what number should be filled in the question mark?
• 2. According to the law between figure and number, what number should be filled in the question mark? Don't just give the answer,
• 3. Law of number matrix graph There are nine numbers: 0, 3, 3, 6, 6, 9, 9, 12, 15. Put them into three columns and three rows, so that the numbers in the nine squares, the addition of three horizontal, vertical and oblique, are equal to the same number!
• 4. As shown in the figure, fill in a number in each of the two spaces, so that the sum of the first two numbers is less than the sum of the last two numbers by 5, and the sum of the three numbers is 0. - 3 + () + ()
• 5. Fill in a number in each of the two spaces, that is, the sum of the first two numbers is 3 less than the sum of the last two numbers, and the sum of the three numbers is 0 （）（）-2
• 6. () (- 2) fill in a number in the first two spaces, that is, the sum of the first two numbers is 3 less than the sum of the last two numbers, and the sum of the three numbers is 0
• 7. Choose 12 natural numbers from 1 to 13 and fill in the 3 × 4 square so that the sum of four numbers in each horizontal line is equal and the sum of three numbers in each vertical line is equal (the sum of horizontal lines is not necessarily equal to the sum of vertical lines)
• 8. In the five Olympic rings, there are 9 blanks. Please fill in the 9 blanks with the numbers 1-9 so that the sum of the numbers in each circle is equal to 13
• 9. Fill in the blanks of the Olympic rings with nine numbers 1-9, so that the sum of the numbers in each circle is equal to 13
• 10. Fill in the small circles with 1 to 9 numbers so that the sum of the four numbers on each side of the triangle is 17? O O O O O O O O O
• 11. Come on! Master, please come in! Fill - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 into 9 spaces in the graph, so that the sum of 3 numbers in each row, 3 numbers in each column and 3 numbers in diagonal is - 15 Nine spaces are 3 * 3 boxes
• 12. Put the nine numbers - 6, - 4, - 2,0,2,4,6,8,10 into the nine spaces, so that there are three numbers in each row and three numbers in each column
• 13. You fill the nine numbers - 2, - 1, 0, 1, 2, 3, 4, 5, 6 into the nine spaces in the graph, so that the three numbers in each row, the three numbers in each column, and the three numbers in diagonal angles add up to 6
• 14. Fill the nine numbers - 8, - 6, - 4, - 2, 0, 2, 4, 6 and 8 into the nine squares in the graph, so that the sum of three numbers in each row, three numbers in each column and three numbers in diagonal angle is 0
• 15. 7 5 3 4 equals 24 And 5 2 3 6 equals 24.8 9 3 1 equals 24
• 16. 1 2 3 = 1 1 2 3 4 5 6 = 1 1 2 3 4 5 6 7 = 1 add, subtract, multiply, divide, brackets make the formula equal to 1
• 17. Put the 8 numbers 0-7 into the formula. 0, () () + 0, () + 0, () () + 0, () = 1, 00 fast
• 18. Fill the seven numbers of 0,1,2,3,7,8,9 in the box to make the formula true □+□=□□-□=□□
• 19. The nine numbers 1-9 shall be filled in the blanks of the following formula respectively, and only one number is allowed to be filled in each blank to make the formula tenable: □
• 20. Fill 0 to 9 in the following space respectively to make the formula hold. Each number can only be used once □ + □ = □ + □ = □ + □