The left is 6, the right is 9, and the top is 30. Here is 24. The reason is that (1) the left side of the first diagram is 2, the left side of the second diagram is 3, the left side of the third diagram is 4, and the left side of the fourth diagram is 5. So the fifth number is 6(2) on the left and 5, 6, 7, 8 and 9 on the right. (3) The upper and lower numbers are multiplied by the left and right numbers, and the upper number is equal to the lower number. The number at the top is greater than the number at the bottom. 6*9=54。 ()+()=54。 There is more than one answer. I gave 30 and 24. (For example, in figure 1: 2*5-7=3. In Figure 2: 3*6- 1 1=7. . .