2. The product of two numbers must be the least common multiple of these two numbers (wrong) is their common multiple, but it is not necessarily the smallest.
3. When the side length of a cube is expanded to 3 times, its surface area is expanded to 6 times and its volume is expanded to 9 times (wrong).
The surface area is expanded to 9 times and the volume is expanded to 27 times.
4. The basic nature of score is the basis of reduction and general score. (right)
5. The operation of sightseeing cable car on the ropeway is a rotating phenomenon. (error)
It should be a translation phenomenon.
6. The minimum multiple of a number is greater than the maximum factor of this number. (error)
Such as: 1. Its minimum multiple is equal to its maximum factor.
I hope I can help you!